Free calculators

Find X% of a number, or what percent one number is of another.

Work out percentage change, apply an increase or decrease, or reverse one to find the original value.

Calculate gross and net profit from price, unit cost, units sold and fixed costs.

Find the selling price from cost and markup, or the markup from cost and price.

Calculate gross margin, the price needed for a target margin, or the maximum cost you can afford.

Add or remove VAT, or work back from a VAT amount. Shows net, VAT and total, with South Africa’s 15% as the default rate.

Sale price and savings from a discount, stacked discounts, or the discount % between two prices.

Monthly repayment, total interest and a full schedule for a fixed-rate loan — including extra payments.

Convert pay between hourly, monthly and annual, and estimate South African PAYE and UIF.

Exact age in years, months and days, plus total days lived and the next birthday.

Days, weeks and months between two dates, with working days that exclude South African public holidays.

Grow a lump sum and monthly contributions over time, with a year-by-year breakdown.

Total an invoice with quantities, line and invoice discounts, VAT-inclusive or exclusive prices, and deposits.

Build a simple profit and loss statement: gross profit, operating profit, net profit and margins.

How many units you must sell to cover fixed costs — and to hit a profit target.

Turn your income goal, costs, time off and billable hours into an hourly and day rate.

Price a product from materials, labour, overheads and sales fees to hit a target margin, with or without VAT.

Add up start-up and running costs to see monthly spend, first-year cost and cash runway.