Fast, free, practical
Simple calculators for real decisions
FastCalc gives you clean, instant answers for salary, VAT, savings, budgeting, loan and percentage calculations without clutter or signup.
Monthly loan payment£327
Monthly take-home£2,612
VAT on £100£20
Fast answers
Built for UK users
Clean estimate-based tools
Core tools
Start with the most useful calculators first. Expand over time.
UK Salary Calculator
Estimate take-home pay with pension, tax and NI assumptions.
Open tool →Hourly to Salary Calculator
Convert hourly pay into annual, monthly and weekly salary estimates.
Open tool →Budget Calculator
Compare income and expenses to see your monthly balance.
Open tool →Savings Goal Calculator
See how long it may take to reach your savings target.
Open tool →Loan Repayment Calculator
Estimate monthly repayments and total interest on a loan.
Open tool →VAT Calculator
Add or remove VAT instantly for pricing and invoices.
Open tool →Percentage Increase / Discount Calculator
Work out discounts and percentage increases in seconds.
Open tool →Percentage Calculator
Handle general percentage calculations quickly.
Open tool →