Free Calculators for the United Kingdom
150+ calculators optimised for UK standards — HMRC tax bands, metric units, NHS health guidelines, and GBP financial calculations.
Most Popular UK Calculators
Stamp Duty Calculator
Calculate SDLT for property purchases in England & N. Ireland. First-time buyer relief, standard, and additional property rates (April 2025).
VAT Calculator
Add or remove 20% VAT from any price. Supports standard (20%), reduced (5%), and zero rates.
National Insurance Calculator
Calculate employee Class 1 NI and self-employed Class 2 & 4 contributions for 2025/26.
Mortgage Calculator
Calculate monthly repayments, total interest, and LTV for UK mortgages.
Stamp Duty Calculator
Calculate SDLT for property purchases across England & Northern Ireland.
BMI Calculator
Check your Body Mass Index using NHS-standard categories and healthy weight ranges.
Built for British Users
Metric Units
Kilograms, metres, litres, Celsius — UK metric standards with imperial alternatives.
HMRC Tax Bands
Personal Allowance, Basic (20%), Higher (40%), Additional (45%) tax rates for 2024/25.
NHS Guidelines
Health calculators follow NHS clinical standards and NICE recommendations.
UK Financial Quick Facts
Personal Allowance 2025/26
£12,570
Earn up to this amount tax-free (frozen until 2028)
State Pension Age
66 years
Rising to 67 between 2026–2028
Stamp Duty Threshold
£125,000
0% SDLT on first £125k (from 1 April 2025)
VAT Standard Rate
20%
Reduced rate 5% on domestic energy & some goods