UK calculators for pay, property and home projects. Free tools using 2026/27 rates, with clear workings and official sources.
Estimate Plan 1, 2, 4, 5 and postgraduate student loan repayments for the 2026/27 tax year using official UK thresholds.
Money & taxSee how much Income Tax and National Insurance you save by sacrificing salary into a pension, with optional employer NI pass-through for 2026/27.
Money & taxCompare estimated take-home pay as a sole trader versus a limited company director taking a salary and dividends in 2026/27.
Money & taxConvert a full-time salary to a part-time or pro-rata salary using hours or days worked each week.
Money & taxEstimate UK dividend tax for 2026/27 using the £500 dividend allowance and rates of 10.75%, 35.75% and 39.35%.
Money & taxSee how much of a UK pay rise you keep after Income Tax and National Insurance, with an optional student loan deduction for 2026/27.
Work out gross yield, net yield and cash-on-cash return for a UK buy-to-let, with optional mortgage interest and running costs.
PropertyCompare your current mortgage rate with a new deal, including fees, monthly saving and break-even time.
Calculate concrete volume in m³ for slabs, footings and post holes, plus how many 20kg or 25kg bags you need, with a ready-mix option.
Home & DIYEstimate how much paint you need for a room in litres and tins, based on wall area, coats and coverage.
Generic tools often ignore UK tax years, student loan plans, Scottish Income Tax or bag sizes from UK merchants. Each Worksitout calculator is written for British rules, shows the rates it uses, and links back to gov.uk sources.
Rates live in one data file so April updates are a single edit. Maths is covered by automated tests against worked examples.