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Profit Margin Calculator

Profit margin percentage calculator. Free online Profit Margin Calculator for financial — instant, accurate results, mobile-friendly, no signup needed.

Profit margin
35%
Profit
$3,500.00

Derivation

  1. ├── 01Givenrev = 10000, cost = 6500
  2. ├── 02FormulaProfit margin: {let t=e.rev;return(t-e.cost) / t × 100}
  3. ├── 03Substitute{let t=e.10000;return(t-e.6500) / t × 100}
  4. ├── 04Compute Profit margin35
  5. ├── 05FormulaProfit: e.rev-e.cost
  6. ├── 06Substitutee.10000-e.6500
  7. └── 07Compute Profit$3,500.00
Did you know?

Margin and markup both measure profit, but on different denominators: a 50% margin = 100% markup. Confusing them is the most common pricing error in retail.

§01What is

Understanding the Profit Margin Calculator

The Profit Margin Calculator computes Profit margin from 2 inputs: revenue ($), costs ($). Profit margin percentage calculator.

Quick calculators for the math that shouldn’t need a notepad — instant, accurate, private to your browser. The Profit Margin Calculator sits in that toolkit — it profit margin percentage calculator. Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.

§02The Formula

How it’s calculated

Profit margin = {let t=e.rev;return(t-e.cost) / t × 100} | Profit = e.rev-e.cost

Where

rev
Revenue ($)
cost
Costs ($)
Profit margin
Output value
Profit
Output value
§03Practical Example

Step-by-step walkthrough

Scenario

Apply the formula to a realistic set of inputs: Revenue ($) = 10000, Costs ($) = 6500.

  1. 01Start by noting the input — Revenue ($): 10000.
  2. 02Start by noting the input — Costs ($): 6500.
  3. 03Substitute these values into the formula: Profit margin = {let t=e.rev;return(t-e.cost) / t × 100} | Profit = e.rev-e.cost
  4. 04Compute Profit margin: the calculator returns 35.
  5. 05Compute Profit: the calculator returns 3500.
  6. 06Cross-check the answer by opening the Derivation panel above — every line of math is shown so you can follow the computation end-to-end.
§04Variants

Common Profit Margin Problems

The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.

01 · PATTERN

Revenue ($) halved

rev = 5000 (from 10000)

Keep every other input at its default and halve the revenue ($). See how profit margin responds.

  1. 01New Revenue ($): 5000
  2. 02Baseline Profit margin: 35
  3. 03New Profit margin: -30
  4. 04Profit margin decreases by 185.7% → use this sensitivity to plan for real-world variation.
02 · PATTERN

Revenue ($) doubled

rev = 20000 (from 10000)

Keep every other input at its default and double the revenue ($). See how profit margin responds.

  1. 01New Revenue ($): 20000
  2. 02Baseline Profit margin: 35
  3. 03New Profit margin: 67.5
  4. 04Profit margin increases by 92.9% → use this sensitivity to plan for real-world variation.
03 · PATTERN

Costs ($) halved

cost = 3250 (from 6500)

Keep every other input at its default and halve the costs ($). See how profit margin responds.

  1. 01New Costs ($): 3250
  2. 02Baseline Profit margin: 35
  3. 03New Profit margin: 67.5
  4. 04Profit margin increases by 92.9% → use this sensitivity to plan for real-world variation.
04 · PATTERN

Costs ($) doubled

cost = 13000 (from 6500)

Keep every other input at its default and double the costs ($). See how profit margin responds.

  1. 01New Costs ($): 13000
  2. 02Baseline Profit margin: 35
  3. 03New Profit margin: -30
  4. 04Profit margin decreases by 185.7% → use this sensitivity to plan for real-world variation.
§05FAQ

Frequently asked questions

Yes. The calculator implements the standard formula as documented and returns exact floating-point results. No approximations are used unless noted in the formula.
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