United Kingdom Calculators

Calculate UK income tax and National Insurance contributions using 2026/27 PAYE bands for England, Scotland, and Wales.

Calculate UK National Insurance contributions (Class 2 and Class 4) for self-employed workers based on net profits.

Estimate UK take-home pay by pay frequency using PAYE tax and National Insurance assumptions.

Calculate your UK university degree classification from module marks. Supports First, 2:1, 2:2, Third, and percentage-based grading.

Calculate VAT (Value Added Tax) for any country. Add or remove VAT from any amount with country-specific rates.

Convert between 60+ world currencies with live exchange rates. Supports USD, EUR, GBP, JPY, and currencies from every continent.

Calculate gross margin, operating margin, and net profit margin from your revenue, COGS, and operating expenses.

Create professional invoices instantly. Add line items, tax, discounts, and download as PDF — no signup required.

Calculate your ideal hourly or project rate based on your desired salary, expenses, taxes, and billable hours.

Find out exactly how many units you need to sell or revenue you need to generate to cover your costs.

Calculate return on investment, net gain, and ROI percentage for projects, marketing campaigns, or purchases.

Convert between markup and margin percentages instantly. Calculate selling price from cost and desired profit.

Calculate sale prices, discount percentages, double discounts, and original prices. See why stacked discounts aren't additive.