Quick answer
Market share = your sales ÷ total market sales × 100. $2,500,000 of sales in a $40,000,000 market is 6.25%.
Enter your sales and the total market sales for the same period. The calculator returns your share.
Related tools: Return on Equity Calculator: Net income relative to average shareholders' equity. Accounts Payable Days Calculator: Days payable outstanding. Accounts Receivable Days Calculator: Days sales outstanding.
How to use the Market Share Calculator
- Enter your sales (above 0).
- Enter total market sales (above 0).
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Your sales | A number | > 0 |
| Total market sales | A number | > 0 |
Formula and method
Formula
Market share = your sales ÷ total market sales × 100
IEEE-754 double precision; shown to the decimals indicated.
Use the same period and unit for both numbers.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Your sales = 2500000; Total market sales = 40000000.
| Result | Value |
|---|---|
| Market share | 6.25% |
Example 2
Inputs: Your sales = 12; Total market sales = 90.
| Result | Value |
|---|---|
| Market share | 13.33% |
The first line is the headline result (market share). IEEE-754 double precision; shown to the decimals indicated.
Defining the market
The answer depends on how you define the market: by product, region and period. A 6.25% share of the whole market may be 20% of a niche. Use the same currency, period and market boundary for both numbers.
Using the figure
Track share over time. Growing sales with a falling share means the market is growing faster than you. Relative market share (your share divided by the largest competitor's) is another common comparison.
How the result changes with your sales
Holding every other input at the first worked example, this table changes only your sales. It shows how sensitive the answer is to that one value; each row was produced by running this calculator.
| Your sales | Market share |
|---|---|
| 1250000 | 3.13% |
| 2500000 | 6.25% |
| 5000000 | 12.5% |
| 10000000 | 25% |
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Your sales: entering "0" shows "Your sales must be greater than 0." beside that field and no result.
- Total market sales: entering "0" shows "Total market sales must be greater than 0." beside that field and no result.
Choosing between the Market Share Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [Return on Equity Calculator](/business/return-on-equity-calculator/) | net income, equity at start and equity at end | Return on equity |
| [Accounts Payable Days Calculator](/business/accounts-payable-days-calculator/) | accounts payable, cost of goods sold and days in period | Days payable |
| [Accounts Receivable Days Calculator](/business/accounts-receivable-days-calculator/) | accounts receivable, revenue and days in period | Days sales outstanding |
| [Cash Conversion Cycle Calculator](/business/cash-conversion-cycle-calculator/) | days inventory outstanding, days sales outstanding and days payable outstanding | Cash conversion cycle |
| [Current Ratio Calculator](/business/current-ratio-calculator/) | current assets and current liabilities | Current ratio |
Background: business metrics
Business ratios depend on exactly which costs and revenues you include, so read each page's definition. Two common checks: break-even units = fixed costs ÷ (price − variable cost per unit), so $50,000 of fixed costs with a $10 price and $5 variable cost breaks even at 10,000 units; and net profit margin = net profit ÷ revenue, so $20,000 profit on $100,000 revenue is 20%.
Return on investment ignores time: 20% over five years is far less impressive than 20% in one, so compare returns over the same period.
Assumptions and limitations
- Denominator must be positive
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for your sales and total market sales to confirm this.
Frequently asked questions
What is a good market share?
It depends on the market; leaders often hold 20% or more.
Where do I get total market sales?
From industry reports, trade bodies or public filings.
Can I use units instead of revenue?
Yes, as long as both use units.
What does the Market Share Calculator calculate?
Market share from your sales and total market sales. It returns Market share.
What formula does the Market Share Calculator use?
Market share = your sales ÷ total market sales × 100. Use the same period and unit for both numbers.
What do I need to enter in the market Share Calculator?
You enter Your sales and Total market sales.
How is the result rounded or limited?
IEEE-754 double precision; shown to the decimals indicated. Denominator must be positive.
What is an example of a market Share result?
With your sales 2500000 and total market sales 40000000, the market share is 6.25%.
Related calculators
- Return on Equity Calculator — Net income relative to average shareholders' equity.
- Accounts Payable Days Calculator — Days payable outstanding.
- Accounts Receivable Days Calculator — Days sales outstanding.
- Cash Conversion Cycle Calculator — Days to turn inventory into cash.
- Current Ratio Calculator — Current ratio from current assets and current liabilities.
- Employee Turnover Calculator — Turnover rate from separations and average number of employees.
Sources
- Common definition used on this page. No single authoritative standard defines it, so the exact formula is stated in the formula section above
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.