All free online tools

103 tools across 10 categories. Everything runs in your browser unless the page says otherwise — no account, no upload, no install.

Showing 15 of 103 tools

Calculate body mass index and weight range.

Estimate monthly payments and total interest.

Convert salary between hourly, monthly and yearly.

Work out exact age between two dates.

Convert length, weight, volume and temperature.

Estimate daily energy needs and calorie targets.

Calculate margin, markup and break-even price.

Convert currencies with live reference rates.

Estimate zakat and retirement contribution impact.

Estimate home loan repayments.

Project growth with regular contributions.

Add or remove sales tax from an amount.

Solve the percentage questions you meet daily.

See final price and savings after a discount.

Create a clean, printable invoice.