United Kingdom Calculators
HMRC-aligned calculators for income tax, National Insurance, and payroll.
United Kingdom Tools
Calculators built specifically for United Kingdom tax rules, rates, and regulations.
UK Income Tax Calculator
Calculate UK income tax and National Insurance contributions using 2025/26 PAYE bands for England, Scotland, and Wales.
Use tool →UK Self-Employment Tax Calculator
Calculate UK National Insurance contributions (Class 2 and Class 4) for self-employed workers based on net profits.
Use tool →UK Payroll Calculator
Estimate UK take-home pay by pay frequency using PAYE tax and National Insurance assumptions.
Use tool →Tools That Also Work for United Kingdom
General-purpose business and finance tools compatible with GBP and international use.
VAT Calculator
Calculate VAT (Value Added Tax) for any country. Add or remove VAT from any amount with country-specific rates.
Use tool →Currency Converter
Convert between 60+ world currencies with live exchange rates. Supports USD, EUR, GBP, JPY, and currencies from every continent.
Use tool →Profit Margin Calculator
Calculate gross margin, operating margin, and net profit margin from your revenue, COGS, and operating expenses.
Use tool →Free Invoice Generator
Create professional invoices instantly. Add line items, tax, discounts, and download as PDF — no signup required.
Use tool →Freelance Rate Calculator
Calculate your ideal hourly or project rate based on your desired salary, expenses, taxes, and billable hours.
Use tool →Break-Even Calculator
Find out exactly how many units you need to sell or revenue you need to generate to cover your costs.
Use tool →ROI Calculator
Calculate return on investment, net gain, and ROI percentage for projects, marketing campaigns, or purchases.
Use tool →Markup & Margin Calculator
Convert between markup and margin percentages instantly. Calculate selling price from cost and desired profit.
Use tool →Discount & Sale Price Calculator
Calculate sale prices, discount percentages, double discounts, and original prices. See why stacked discounts aren't additive.
Use tool →Related Countries
Explore calculators for other countries in the same region.
Frequently Asked Questions
- Is ConvertCrunch free for United Kingdom users?
- Yes. All United Kingdom tools on ConvertCrunch are completely free with no signup, no ads gating, and no data uploads.
- What tax year do the United Kingdom calculators use?
- The United Kingdom calculators use 2024-25 tax year rates and thresholds. We update them each year when new rates are published.
- Are the United Kingdom calculator results accurate enough for filing?
- Our calculators provide close estimates for planning purposes. Always verify final numbers with your accountant or tax authority before filing.