Calculators

Unit Converter

Convert length, weight, area, volume, temperature, speed and more. The result appears as you type.

VAT Calculator

Add VAT to an amount, or take it out of a tax-inclusive amount, at the rate you enter.

Profit Margin Calculator

Work out profit margin and markup, or find the selling price or the cost from a percentage you know.

Discount Calculator

Find the price after a discount and what you save, or work back to the discount rate or the original price.

Percentage Calculator

Find a percentage of a number, what percentage one number is of another, or the percentage change between two values.

Product Pricing Calculator

Add purchase, shipping, packaging, and fee costs to reach a target price and estimated margin.

Break-Even Calculator

Estimate the units or revenue needed to cover fixed and variable costs you enter.

Payment Processing Fee Calculator

Calculate fees, net received, or the amount to charge from a rate and fixed fee you enter.

ROI Calculator

Calculate simple return from a cost and a gain, showing what was treated as profit or revenue.

ROAS Calculator

Calculate attributed revenue against ad spend, with an optional margin.

Customer Acquisition Cost Calculator

Divide an acquisition cost you enter by the number of new customers in a stated period.

Average Order Value Calculator

Calculate average order value from revenue and order count, and compare two periods.

Successive Discount Calculator

Apply several discounts in order and show the effective discount instead of adding the rates.

Interest Free Payment Schedule

Split a total into a down payment and installments, putting the rounding difference on the last payment.

Subscription Cost Calculator

Add monthly and yearly subscriptions and show one monthly and yearly cost.

Weighted Amount Splitter

Split an amount equally, by weights, or by percentages, and distribute rounding differences.

Supplier Quote Comparison

Compare quotes that differ in unit, quantity, discount, and shipping on one cost basis.

Work Time Cost Calculator

Turn hours, an hourly cost, and extra expenses into an estimated task cost.

Manual Exchange Rate Calculator

Convert currency at a rate you type, with direction and commission, without live rates.

Data Size Converter

Convert bits, bytes, kB, and KiB, and distinguish decimal from binary units.

File Transfer Time Calculator

Estimate upload or download time from file size, connection speed, and an efficiency factor.

Screen PPI Calculator

Calculate pixel density and screen size from resolution and diagonal, and compare two screens.

Paper Size Comparison

Compare A, B, Letter, Legal, and custom sizes, and see whether they fit for printing.

Scale Drawing Calculator

Convert a real measurement and a drawing measurement at a scale, with consistent units.

Area and Volume Calculator

Calculate area, perimeter, and volume of common shapes from measurements you enter.

Fraction and Ratio Calculator

Add, subtract, multiply, divide, and simplify fractions, or convert them to a ratio or decimal.

Number List Statistics

Show sum, mean, median, mode, and spread for a list of numbers, with the method used.

Proportion Calculator

Solve a direct or inverse proportion from three values and show the relationship and units.

Rounding and Significant Figures

Round a number or a list by decimal places or significant figures, and state the rule.

Random Name Picker and Group Generator

Pick names at random or assign groups. It is not a certified official draw.

Unit Price Comparison

Normalize package weight or volume and price to compare the unit cost.

Trip Fuel Cost Calculator

Estimate fuel and cost from distance, consumption, and a price per litre, with an optional split.

Appliance Energy Cost Calculator

Estimate kilowatt-hours and cost from appliance power, hours, and a tariff you enter.

Shipping Volumetric Weight Calculator

Calculate volumetric weight from dimensions and a divisor, and compare it with actual weight.

Simple Customer Lifetime Value Calculator

Estimate customer value from average purchase, frequency, duration, and margin, showing the assumptions.

Currency Converter with Published Rates

Use cached periodic data from a suitable provider, and show the source, update time, and usage limits.