Free UK calculators · 2026/27 rates
UK money maths, measured properly.
Pay, tax, mortgages, stamp duty and electric cars, worked out in seconds. No sign-up, and nothing you type leaves your browser.
Take-home pay, quick look
£30,000 salary£2,093/mo£40,000 salary£2,693/mo£50,000 salary£3,293/mo Try your own salaryMost used calculators
Take-home pay calculatorYour salary after tax, NI, pension and student loan.Stamp duty calculatorSDLT for movers, first-time buyers and second homes.Mortgage calculatorMonthly payments, total interest and rate-rise impact.EV salary sacrifice calculatorThe true monthly cost of an EV through work.
Money news, explained
0%VAT cut on electricity bills: what you'll save, and why Northern Ireland is differentHousehold electricity in Great Britain is VAT-free until the end of March 2027. Here's what it saves you, and how Northern Ireland's £63 credit works instead.+41.8pWhat is the Iran war costing UK households? The real numbersPetrol is up 42p a litre, diesel is at a record high and the average two-year mortgage fix is near 6%. Here's what the war is really costing UK households.
Money
Take-home pay calculatorYour salary after tax, NI, pension and student loan.EV salary sacrifice calculatorThe true monthly cost of an EV through work.EV running cost calculatorElectric vs petrol, pence per mile and per year.EV comparison toolCompare up to three EVs side by side.Stamp duty calculatorSDLT for movers, first-time buyers and second homes.Mortgage calculatorMonthly payments, total interest and rate-rise impact.Savings calculatorCompound interest with monthly deposits.VAT calculatorAdd or remove VAT at 20%, 5% or any rate.Percentage calculatorPercent of, percent change and more.
Writing
Word counterWords, characters and reading time.Text case converterUpper, lower, title and sentence case.
Everyday
Date calculatorDays between dates and working days.Unit converterMetric and imperial conversions.Password generatorStrong random passwords, made in your browser.QR code generatorFree QR codes that never expire.
Guides with a simple version
£25,000 after tax in 2026/27: your take-home payStamp duty for home movers in 2026: how much will you pay?Compound interest explained: how your savings really growElectric vs petrol: real running costs over 10,000 milesHow many words is a 5-minute speech? Speaking times explained£30,000 after tax in 2026/27: your take-home payStamp duty on second homes and buy-to-let in 2026Mortgage overpayment vs saving: which is better for you?
Hi, I'm Andrew.I built Sumly in Northern Ireland to make UK money maths simple and free. Every figure is checked against GOV.UK and HMRC.
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The money calculators use the current UK tax year's rates and are checked when rates change. They're designed to give you a quick, reliable estimate. For decisions that matter, check the figures with HMRC, your lender or a qualified adviser.