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Stock market calculators · Reporting-period basic EPS

Earnings Per Share Calculator

Created by Arunangshu DasReviewed

Calculate basic earnings per share using common-attributable earnings and weighted-average common shares.

Match the earnings and share count to one issuer and reporting period.

Reporting-period earnings and shares

Use the same issuer, period and adjusted share basis. Enter actual shares and amounts in major currency units.

Changing the basis clears monetary inputs. Use an explicit zero for a known zero deduction.

Formatting only. The calculator performs no currency conversion.

Basic earnings per share

Enter the reporting-period figures or load the worked example.

Uses the supplied basic share count. It does not calculate dilution, dividends per share or valuation.

Understand the numerator and weighted share count

Follow a midyear share issue and see how period-end shares can change the answer.

Read the complete Earnings Per Share guide

Formula and methodology

Basic EPS = E ÷ W
E = earnings attributable to common holders.
W = weighted-average common shares outstanding.

Divide earnings attributable to common holders by positive weighted-average common shares. If the earnings already belong to common holders, enter them directly. If your starting amount is parent earnings before an applicable preferred deduction, supply that deduction separately. Deduct it once.

Definitions

Basic earnings per share measures the earnings attributable to common or ordinary shareholders for each weighted-average common share outstanding during the same reporting period.

Verified worked examples

Parent earnings of 270 million less a 20 million preferred deduction give 250 million attributable to common holders. In a hypothetical 360-day reporting period with 100 million shares for 180 days and 150 million for the other 180 days, the weighted average is 125 million and basic EPS is 2.00. Using 150 million ending shares instead would give about 1.67.

Interpretation

Negative common earnings produce a loss per share. A zero numerator produces zero EPS. A change in EPS can reflect changes in earnings, the share count, or both.

Inputs and interpretation

Choose an earnings basis, enter signed earnings and any applicable preferred deduction, then supply the reported or independently calculated weighted-average basic share count. Use actual shares and amounts in major currency units. Enter zero only when the figure is known to be zero.

Assumptions and limitations

Use one issuer, reporting period and adjusted share basis. The preferred deduction, if supplied, must already reflect the appropriate accounting treatment. Use the direct earnings mode if the issuer already discloses an adjusted common-attributable numerator.

Supported domain and common mistakes

Use ungrouped decimals of up to 48 trimmed characters and 12 fractional places. Input amounts are bounded at 10^15 in magnitude and shares must be positive and no greater than 10^15. The quotient uses 80 significant digits. Currency display rounds half-even to cents and marks tiny nonzero amounts.

Do not use closing shares after an issue or buyback, mix diluted and basic inputs, subtract preferred amounts twice, or combine quarterly earnings with annual shares. Review the issuer's EPS note for reconciliations and restatements.

Frequently asked questions

How do I calculate basic earnings per share?
Divide earnings attributable to common shareholders by the positive weighted-average number of common shares for the same period.
Which earnings basis should I choose?
Use the direct basis for an already adjusted common numerator. Choose parent earnings before preferred deduction only when your input is measured before the specific deduction you supply.
Can EPS be negative?
Yes. A loss attributable to common holders gives negative basic EPS when weighted shares are positive.
Can I use the period-end share count?
Use the weighted-average basic count. The closing count is a suitable input only if it equals that weighted average on the correct share basis.
Does this calculate diluted EPS?
It computes basic EPS. Diluted reporting can require separate changes to both earnings and shares and depends on instrument terms.
Does changing the currency change EPS mathematically?
The market selection changes formatting. Enter earnings and any deduction in one currency before using the calculator.

Sources and educational scope

Educational estimate from supplied reporting figures. No live data, FX, taxes, dilution, automatic corporate-action adjustment, valuation or personalized investment advice.

Reviewed . AI-assisted content under operator editorial responsibility; no independent expert financial review is claimed.

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