Business Calculators

Calculate the internal rate of return and net present value for any series of cash flows, however irregular.

Find how long an investment takes to repay itself, both in simple terms and discounted for the time value of money.

Calculate return on investment from what you put in and what you got back, plus the annualised return that makes different holding periods comparable.

Calculate profit margin from cost and price, or work backwards to the price you need to hit a target margin. Shows markup alongside it.

Apply a markup percentage to a cost to get the selling price, and see the profit margin that markup actually produces.

Work out a sale price and how much you save, including stacked discounts — and see why 20% off then 10% off is not 30% off.

Calculate sales commission from a flat rate, a tiered structure, or a base salary plus commission — with total pay shown.

Compare several package sizes by price per unit to find which is genuinely the best value, even when the sizes use different units.

Work out how many units you must sell to cover your fixed costs, the revenue that represents, and the margin of safety on your sales target.

Add sales tax, VAT or GST to a price, or strip it back out of a tax-inclusive total to find the net amount.

Work out the tip and split a bill between any number of people, with an option to round the total to something convenient.

Calculate asset depreciation using straight-line, declining balance or sum-of-years-digits methods, with a full year-by-year schedule.

Calculate customer acquisition cost, lifetime value, the LTV:CAC ratio and payback period, plus net burn rate and cash runway.

Calculate inventory turnover, days inventory outstanding, and the economic order quantity that minimises total ordering and holding cost.

Work out the true annual cost of an employee: salary, employer payroll taxes, benefits, equipment and overhead, with the cost per productive hour.

Work out interest and fees on an overdue invoice, by days late, with UK statutory interest, a flat monthly rate, or your own contract terms.

Split a pooled tip total between staff by hours worked or role weighting, with an optional tip-out to support staff taken off the top.