Audited —·Last updated 29 Jul 2026·6 citations·Tier 1·0 uses

ARPU Calculator — Average Revenue Per User

Free ARPU calculator using the definition US companies file with the SEC. Solve for average revenue per user, for revenue, or for the users you need.

ARPU Calculator

What do you want to work out?
Recurring service or subscription revenue for the whole period — not total revenue. T-Mobile uses service revenues and excludes equipment sales; Netflix uses streaming revenues. Including one-off or hardware revenue produces a different, larger metric.
$
The average over the period, not the closing balance — usually the mean of the monthly balances, or at minimum the mean of the opening and closing counts. Enter accounts instead of users and you get ARPA. State which population you used: some filers count total customers, others count only active ones.
1 for a month, 3 for a quarter, 12 for a year. This is the second division in the SEC-filed definition and it is where most hand calculations go wrong.
months
Used only when solving for revenue or for users. If you are reverse-engineering from a published ARPU, remember it has been rounded to the cent — the user count you get back will be slightly off.
$
Monthly ARPU
$16.00
Average recurring revenue per user per month. The denominator is yours to choose — users or accounts, total or active — and whichever you pick must be disclosed with the number.
Revenue per user, whole period
$48.00
Annualised ARPU
$192.00
Revenue in the calculation
$1,200,000.00
Users in the calculation
25,000
Annual revenue run rate
$4,800,000.00
Convention
Revenue ÷ average users ÷ months in period

Background.

ARPU — average revenue per user — is the amount of recurring revenue one customer produces per month. It is the bridge between a user count and a revenue line, and unlike most of the metrics in this cluster it has a genuinely primary source: US public companies define it, word for word, in filings made under SEC rules. This calculator implements the definition a registrant actually files, and it inverts it in both directions, so you can also solve for the revenue a user base will produce or the number of users a revenue target requires.

The canonical wording comes from T-Mobile US's Form 10-K. "Average Revenue per User ('ARPU') represents the average monthly service revenue earned per customer. ARPU is calculated as service revenues for the specified period divided by the average number of customers during the period, further divided by the number of months in the period." Note the two divisions. Dividing quarterly revenue by users gives you revenue per user per quarter, not per month, and forgetting the second step is the single most common error in a hand-calculated ARPU. This page reports both figures separately: at its defaults, $1,200,000 of quarterly revenue across 25,000 users is $48.00 per user for the quarter and $16.00 per user per month.

The definition can be checked rather than merely quoted, because Netflix discloses every term of it. Its fiscal-2024 Form 10-K reports United States and Canada streaming revenue of $17,359,369 thousand, average paying memberships of 84,112 thousand, and an average monthly revenue per paying membership of $17.20. Run those two inputs through this calculator and it returns 17.1986646773, which displays as $17.20. The same holds for its other regions: $12,387,035 thousand over 94,200 thousand memberships gives $10.96, matching the filing, and the global figures give $11.70, also matching. Three independent reproductions of published numbers, which is a stronger claim than any calculator page can usually make.

What the definition does not fix is who counts as a user, and that ambiguity is visible inside the SEC's own filing archive. VEON's filed glossary of telecommunications terms defines ARPU as calculated "for the average number of total customers or of active customers in the same period" — two different denominators, one metric name, in a single sentence. T-Mobile, in the same filing that defines ARPU, separately defines ARPA, average revenue per account, over a different denominator again, because one account can carry several lines. For fiscal 2024 T-Mobile reported postpaid phone ARPU of $49.35 and prepaid ARPU of $36.06; those are different populations, not different businesses. This calculator is deliberately denominator-agnostic. Enter users and it computes ARPU; enter accounts and it computes ARPA; the arithmetic is identical, and the choice — along with whether you counted total or only active customers — is yours to make and yours to disclose. SEC Release 33-10751 is explicit on the point: a company presenting a metric should give "a clear definition of the metric and how it is calculated," and should disclose any change in the method of calculation between periods.

Two cautions belong next to the number rather than beneath it. First, ARPU is an average, and a blended ARPU across a customer base with $9 self-serve plans and $5,000 enterprise contracts describes neither cohort; every serious operator computes it per segment. Second, ARPU is revenue, not profit. It has to be multiplied by gross margin before it can enter a lifetime-value or CAC-payback calculation, because the cost of serving the customer never becomes profit. Both of those calculators are linked below and both expect the gross-margin-adjusted figure.

What is arpu calculator?

ARPU is recurring revenue for a period divided by the average number of users over that period, divided again by the number of months in the period. T-Mobile US's Form 10-K states it as "service revenues for the specified period divided by the average number of customers during the period, further divided by the number of months in the period," and that two-step division is the definition this calculator implements. ARPU is not a GAAP measure — it is a company-specific operating metric that registrants disclose voluntarily in MD&A, which is why the SEC's 2020 guidance on key performance indicators requires a clear definition and calculation to accompany it. Three things vary between reporters and must be stated: which revenue is in the numerator (service or subscription revenue, usually excluding equipment and one-off sales), which population is in the denominator (users or accounts, total or active), and how the average is taken across the period. The closely related ARPA, average revenue per account, uses exactly the same arithmetic over an account count rather than a user count and is the more natural metric for B2B software, where a customer is a company rather than a person. This calculator computes either, and also solves the identity backwards for revenue or for the user count a revenue target requires.

How to use this calculator.

  1. Choose a period and stick to it. Quarterly is the most common reporting cadence; monthly is fine for a self-serve product. Every input must describe the same window.
  2. Enter recurring revenue for that period — subscription or service revenue only. Including hardware, one-off setup fees or professional services produces a larger metric that is not comparable to anyone else's ARPU.
  3. Enter the average user count over the period, not the closing balance. During fast growth those differ substantially: use the mean of the monthly balances if you have them, or at minimum the mean of the opening and closing counts.
  4. Set the months in the period. This is the second division in the filed definition, and skipping it is the most common hand-calculation error.
  5. Read both the monthly and the whole-period figures. They are the same fact stated over different windows, and quoting the wrong one is how ARPU comparisons go wrong between companies with different reporting cadences.
  6. Segment before you conclude anything. Then multiply by gross margin before feeding the result into the lifetime-value or CAC-payback calculators — those want gross profit per user, not revenue per user.

The formula.

ARPU = R ⁄ U ⁄ m · R = ARPU × U × m · U = R ⁄ (ARPU × m)
R · recurring revenue for the periodU · average users (or accounts) over the periodm · number of months in the periodARPU · average revenue per user per month

The identity has three terms and this calculator solves for any one of them. Solving for ARPU divides period revenue by the average user count and then by the number of months, exactly as T-Mobile's filed definition states. Solving for revenue multiplies ARPU by users and by months. Solving for users divides revenue by the product of ARPU and months. Three supporting figures come out of every mode: period ARPU is revenue over users before the months divisor, so it equals monthly ARPU only when the period is a single month; annualised ARPU is the monthly figure times twelve; and the annual revenue run rate is the monthly figure times the user base times twelve, which is a snapshot rather than a forecast because it assumes neither growth nor churn. Rounding happens once, at the return boundary, to ten decimal places, on a private forty-digit decimal context that nothing elsewhere on the site can alter. That is why the Netflix reproduction works: the module returns 17.1986646773 and the two-decimal currency display renders it as the $17.20 the filing prints. There are no thresholds or benchmark bands in this formula, so unlike the ratio and payback calculators there is no classification that an intermediate rounding could push across a boundary. Zero revenue is permitted when solving for ARPU — a product with users and no revenue has an ARPU of exactly zero — but a zero user count is not, because the metric is undefined, and neither zero revenue nor zero ARPU is permitted when solving for the user count.

A worked example.

Example

This example is a real, checkable filing rather than an invented scenario. Netflix's Form 10-K for fiscal year 2024 reports United States and Canada streaming revenue of $17,359,369 thousand, average paying memberships of 84,112 thousand, and an average monthly revenue per paying membership of $17.20. Entering $17,359,369,000 of revenue, 84,112,000 average memberships and a twelve-month period, the calculator returns a monthly ARPU of 17.1986646773, which the two-decimal currency display renders as $17.20 — the number in the filing. Revenue per member for the whole period is $206.38, and because the period is twelve months the annualised figure is the same $206.38; the annual revenue run rate comes back to $17,359,369,000, which is the original revenue, as it must be. Two things are worth taking from this. The first is that ARPU is a two-step division, and the intermediate $206.38 is a real number that is easy to mistake for the answer — a company reporting on a quarterly cadence would show $48.00 per user per quarter and $16.00 per month from the same underlying data, and quoting the wrong one makes cross-company comparison meaningless. The second is what happens if you try to run the calculation backwards from a published figure. Switch the mode to 'users needed', enter $17,359,369,000 of revenue, the published $17.20 ARPU and twelve months, and the calculator returns 84,105,470 average memberships — 6,530 thousand-member units short of the 84,112,000 Netflix actually reported. Nothing is wrong with the arithmetic; the published ARPU was rounded to the cent, and at this scale a cent of rounding is worth thousands of subscribers. Reverse-engineer an operating metric from a rounded disclosure and you will always land near, but not on, the truth.

average Users84,112,000
total Revenue17,359,369,000
months In Period12
solve Forarpu

Frequently asked questions.

What is the formula for ARPU?
Recurring revenue for the period, divided by the average number of users over that period, divided again by the number of months in the period. T-Mobile US states it in its Form 10-K as "service revenues for the specified period divided by the average number of customers during the period, further divided by the number of months in the period." The second division is the one people forget. Dividing a quarter's revenue by its users gives revenue per user per quarter — three times the monthly figure — and comparing that to another company's monthly ARPU is a straightforward factor-of-three error.
What is the difference between ARPU and ARPA?
The denominator. ARPU divides by users or customers; ARPA divides by accounts. T-Mobile defines both in the same filing precisely because they differ: an account can carry several lines, so ARPA is the larger number for the same revenue. For B2B software the account is usually the right unit, which is why David Skok's SaaS definitions use ARPA — "average monthly recurring revenue per account" — rather than ARPU. For consumer subscriptions where one person equals one subscription the two collapse into the same figure. This calculator computes either; the arithmetic is identical, and what matters is that you say which denominator you used.
Should ARPU use total users or only active users?
Both are defensible and the choice must be disclosed, because filers genuinely differ. VEON's glossary of telecommunications terms, filed with the SEC, defines ARPU as calculated "for the average number of total customers or of active customers in the same period" — the ambiguity is in the definition itself. Using total customers gives a lower ARPU and a more conservative picture; using active customers gives a higher one that better describes engaged revenue but can hide a growing base of dormant accounts. Whichever you choose, keep it constant and say so: SEC Release 33-10751 requires disclosure whenever a company changes the method of calculating a metric it presents.
Which revenue goes into ARPU?
Recurring service or subscription revenue for the period, not total revenue. T-Mobile uses service revenues and excludes equipment sales, which for a mobile carrier is a very large exclusion. Netflix uses streaming revenues and, in years when it still had one, excluded the DVD business. The principle is that ARPU should describe the ongoing relationship, so one-off implementation fees, hardware, professional services and pass-through charges normally sit outside it. If you include them, the resulting number is larger, is not comparable to anyone else's ARPU, and should be labelled something else.
How do I calculate the average number of users?
The average over the period rather than the closing balance, and the method matters most when you are growing fast. The strongest approach is the mean of the monthly balances within the period. A common simplification is the mean of the opening and closing counts, which is the same thing when growth is linear and understates the denominator when growth accelerates late in the period. Fader and Hardie note both conventions in their discussion of the "number at risk" and prefer the opening balance for discrete-period work. Using the closing balance alone is the one choice to avoid: during growth it inflates the denominator and understates ARPU.
What is a good ARPU?
There is no benchmark, and any source offering one is describing a market rather than a standard. ARPU is a price point multiplied by a purchasing pattern, so it varies by orders of magnitude between business models: T-Mobile reported postpaid phone ARPU of $49.35 and prepaid ARPU of $36.06 for fiscal 2024, Netflix reported $17.20 for United States and Canada and $10.96 for Europe, the Middle East and Africa, and an enterprise software company might report several thousand dollars per account per month. What matters is the trend in your own ARPU, whether it is rising because of pricing or falling because of mix, and whether it clears your customer acquisition cost quickly enough — which is the CAC payback question, not an ARPU question.
Is a rising ARPU always good?
No, and this is the most common misreading of the metric. ARPU can rise because you raised prices, because customers upgraded, or because you stopped acquiring cheap customers — and the third of those looks identical to the first two in the number while meaning something very different for growth. It can also rise purely because low-spending users churned out, which improves the average while shrinking the business. Because ARPU has a user count in its denominator, always read it beside the count itself and beside total revenue. A rising ARPU on a falling user base is usually a business contracting toward its most committed customers, not a business improving.
How does ARPU feed into lifetime value and CAC payback?
Both of those calculations want gross profit per user per month, not revenue per user per month, so ARPU has to be multiplied by your gross margin before it is used. The reason is that hosting, support, payment processing and third-party licences consume part of every revenue dollar before it can repay an acquisition cost or accumulate into a lifetime value. Skipping the adjustment inflates lifetime value by one over your gross margin — 25% at an 80% margin — and shortens the apparent CAC payback by the same proportion. The lifetime-value and CAC-payback calculators linked from this page both take gross margin as a separate input for exactly this reason.
Can I work out my user count from a published ARPU?
Approximately, never exactly, because published ARPU is rounded. This calculator's 'users needed' mode does the arithmetic: revenue divided by the product of ARPU and the number of months. Run Netflix's fiscal-2024 United States and Canada revenue of $17,359,369 thousand against its published $17.20 ARPU over twelve months and you get 84,105,470 memberships, while the filing reports 84,112 thousand — a gap of about 6,530 thousand-member units created purely by rounding to the cent at a scale of eighty-four million subscribers. The mode is genuinely useful for planning, where you are choosing a target ARPU rather than reconstructing a reported one.

References& sources.

  1. [1]T-Mobile US, Inc. — Form 10-K for the fiscal year ended December 31, 2024 (EDGAR accession 0001283699-25-000012). MD&A: "Average Revenue per User ('ARPU') represents the average monthly service revenue earned per customer. ARPU is calculated as service revenues for the specified period divided by the average number of customers during the period, further divided by the number of months in the period," plus the parallel ARPA definition and the reported postpaid phone ARPU of $49.35 and prepaid ARPU of $36.06. Public EDGAR filing; sec.gov refuses generic automated fetchers, so this was retrieved with a declared user agent per the SEC's access policy. Retrieved 2026-07-29.
  2. [2]Netflix, Inc. — Form 10-K for the fiscal year ended December 31, 2024 (EDGAR accession 0001065280-25-000044). Regional MD&A tables disclose streaming revenues, average paying memberships and average monthly revenue per paying membership, allowing the definition to be reproduced exactly: UCAN $17,359,369k over 84,112k memberships = $17.20; EMEA $12,387,035k over 94,200k = $10.96; global $39,000,966k over 277,730k = $11.70. Retrieved 2026-07-29 with a declared user agent.
  3. [3]VEON Ltd. — "Glossary of Telecommunications Terms," Exhibit 99.1 to its SEC annual report (EDGAR accession 0001468091-22-000044): "'ARPU' — Average revenue per user of telephone services, calculated over a given period of time for the average number of total customers or of active customers in the same period." The source of the total-versus-active ambiguity documented on this page. Retrieved 2026-07-29 with a declared user agent.
  4. [4]U.S. Securities and Exchange Commission — "Commission Guidance on Management's Discussion and Analysis of Financial Condition and Results of Operations," Release Nos. 33-10751; 34-88094; FR-87, issued 30 January 2020. Requires "a clear definition of the metric and how it is calculated," a statement of why it is useful and how management uses it, and disclosure of any change in the method of calculation; names "revenue per subscriber" among the company-specific metrics registrants voluntarily disclose. Federal Register text via GovInfo; retrieved 2026-07-29.
  5. [5]Skok, D. "SaaS Metrics 2.0 — Detailed Definitions," forEntrepreneurs.com. Defines ARPA as "average monthly recurring Revenue per Account" and uses it, rather than ARPU, as the revenue input to the SaaS lifetime-value and CAC-payback formulas. Undated revision, current as retrieved 2026-07-29.
  6. [6]Fader, P. S., & Hardie, B. G. S. (2010). "Customer-Base Valuation in a Contractual Setting: The Perils of Ignoring Heterogeneity." Marketing Science, 29(1), 85–93. Footnote 2 sets out the two standard conventions for the period denominator — the opening balance, or the mean of the opening and closing balances — and prefers the opening balance for discrete-period work. Author copy; retrieved 2026-07-29.
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