Simple calculators
for everyday UK life.
Quick, accurate answers for money, family, home and everything in between - free, no sign-up, updated for the 2026/27 UK tax year.
Popular UK calculators
Take Home Pay
The one everyone needs. Paste your salary, get your actual take-home. Handles Scottish tax, pension, student loans, and the allowance taper above £100k.
Maternity Pay
SMP replaces your salary for 39 weeks, but not all of it and not equally. The first six weeks are 90% of earnings; after that it drops to the flat rate. This works out exactly what you will receive.
Overtime Pay
Most people know their overtime rate but still get the numbers wrong after a long week. Enter your base pay, hours and rate multiplier to see exactly what you have earned.
Compound Interest
The maths behind compound interest is simple. The intuition is less obvious. Enter your balance, rate and regular contribution to see how the curve grows over time.
Tile Calculator
Measure the room, set a wastage margin and this works out how many tiles you need. Adjust the wastage if you are cutting around a lot of edges or doing a diagonal pattern.
Baby Weight (kg ↔ lb)
UK midwives record in kilograms. Grandparents want pounds and ounces. This converts between them instantly, in either direction.
Mortgage
Monthly repayments are only half the story. The total interest over the full term is usually the number that changes how you think about the size of a mortgage.
Remortgage Calculator
Work out how much you could save by switching mortgage deals - including fees, ERC and break-even point.
Latest additions
Free Sole Trader Invoice Generator
Create professional sole trader invoices and download as PDF — no CRN needed, with fields for your trading name and UTR. Free, no sign-up.
Free CIS Invoice Generator: Construction Industry Scheme
Generate CIS-compliant invoices as a construction subcontractor — showing labour, materials and the correct CIS deduction. Download as PDF free.
Free UK Invoice Generator
Create professional UK invoices in seconds and download as PDF — free, with no sign-up required.
UK-specific
Tax bands, NI, SMP and benefit thresholds - all using current UK figures, not US or generic rates.
Private by default
All calculations run in your browser. We don’t store your numbers or require an account.
Always free
Every calculator stays free to use. Ads keep the lights on so you can focus on the answer.
Mobile friendly
Designed for phones first - use at your desk, on the bus, or at the till.