Are the results accurate?

What to expect

Each calculator page shows its formula and a worked example, so you can check the working yourself. A result is only as good as the numbers and assumptions you enter.

Calculators give guidance. They are not financial, medical or tax advice.

Check a result yourself

1. 1Scroll below the calculator to the formula.
2. 2Read the worked example to see how the steps go.
3. 3Put your own numbers into the formula and work through it by hand.
4. 4Compare your figure with the result on the page.

The See how the result changes tables help too. Each one re-runs the calculator with a single input changed and everything else left as it is.

Why a figure may differ from elsewhere

• Rounding: results are shown to a sensible number of decimals, but the calculation uses the full values you enter. A rounded total can differ by a paisa from adding rounded parts by hand.
• Different inputs: a small change in a rate, a date or a unit changes the answer.
• Real-world terms: a lender, employer or doctor may apply rules and conditions that a calculator does not know about.

If something still looks wrong

Use Contact support. Tell us the calculator's name and the values you entered, so the team can reproduce what you saw.