What you can calculate in this section
Connect revenue, expenses, working capital and retained earnings to the statements where they appear. Start with the result you need, then confirm that every input comes from the same period and uses the definition shown on the selected page.
A calculator returns a mathematical result. The worked example and limitations explain whether that result belongs in the decision you are making.
8 guides and calculators
Each page below gives the direct definition first, then the equation or method, inputs, sample calculation, common mistakes and related formulas.
Cash Flow Statement
cash flow statement explained with the formula, inputs, example and limitations.
Open Cash Flow Statement →Profit and Loss
profit and loss explained with the formula, inputs, example and limitations.
Open Profit and Loss →Retained Earnings Formula
retained earnings formula explained with the formula, inputs, example and limitations.
Open Retained Earnings Formula →Working Capital Formula
working capital formula explained with the formula, inputs, example and limitations.
Open Working Capital Formula →Profit and Loss Statement Example
profit and loss statement example explained with the formula, inputs, example and limitations.
Open Profit and Loss Statement Example →Revenue Formula
revenue formula explained with the formula, inputs, example and limitations.
Open Revenue Formula →Interest Income
interest income explained with the formula, inputs, example and limitations.
Open Interest Income →Income Statement Formula
income statement formula explained with the formula, inputs, example and limitations.
Open Income Statement Formula →How to choose the right formula
- Name the decision.
Decide whether you need a value, rate, margin, return, balance or comparison. - Match the timing.
Use annual figures with annual figures and distinguish a point-in-time balance from a period flow. - Check the definition.
Confirm what each numerator, denominator, cash flow or cost includes. - Run an example.
Reproduce the sample result before entering your own figures. - Test another case.
Change one assumption at a time and record what drives the answer.
Frequently asked questions
What is financial statement formulas?
Connect revenue, expenses, working capital and retained earnings to the statements where they appear.
How should I use financial statement formulas?
Use the formula only after matching every input to the same period, unit and definition. Then compare the result with a worked example and the decision you are trying to make.
What is the most common mistake with financial statement formulas?
The most common mistake is choosing a familiar formula before defining the decision, period, units and available inputs.
Can I calculate financial statement formulas in a spreadsheet?
Yes. Reproduce the displayed equation with separate cells for each input, keep percentages as decimals, and test the spreadsheet against the worked example before replacing the sample figures.
Sources and methodology
The section’s financial context is checked against Beginners’ Guide to Financial Statements. Each leaf page names the source used for its specific formula or reporting relationship.