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Plan 2 Student Loan Repayment in the UK (2026 Guide)
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Calculadora
Free online calculadora for the UK — scientific, keyboard-friendly and ad-light.
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Welcome to Calculadora
Calculadora.co.uk is a free online calculadora for every need — tax, finance, maths, health and more. Every calculadora on this site is free, fast and reviewed by named UK editors, with the formulas shown in plain English.
Maths Calculadora
Percentages, areas, trigonometry and statistics in one clear calculadora — with every formula on show.
Finance Calculadora
UK mortgages, VAT, stamp duty and compound interest in a calculadora built around current HMRC and GOV.UK rules.
Salary Calculadora
PAYE take-home pay, National Insurance and student loans in a UK calculadora that tracks the current tax year.
Nutrition Calculadora
BMI, BMR, calories and macros in a calculadora that explains what the numbers actually mean for your health.
Date Calculadora
Add or subtract days, work out age or the gap between two dates in a snappy date calculadora.
Text Calculadora
Character count, word count, alphabetical sorting and keyword extraction in a ready-to-use text calculadora.
Architecture Calculadora
Water-tank volume, ramp gradient and other practical tools in a calculadora for UK builders and architects.
Health Calculadora
Body-fat percentage, heart-rate zones and pregnancy due date in an NHS-aligned health calculadora.
Conversion Calculadora
Length, weight, temperature, volume, speed and currency in one precise conversion calculadora.
Vehicle Calculadora
Fuel cost, MPG, UK road tax (VED) and lease-vs-buy maths in a calculadora for motorists.
Cooking Calculadora
Recipe scaling, oven-temperature conversion and grams-to-cups in a kitchen-ready calculadora.
Business Calculadora
Runway, burn rate, ROI, break-even and equity dilution in a calculadora built for UK founders and operators.
Education Calculadora
GPA, final-grade needed, weighted grades and ENEM score in a study-ready calculadora for students and teachers.
Trusted by millions of searches
Trusted by millions of searches
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Most-used calculadoras
- MathsUse calculadoraPercentage calculadora
Work out a percentage of a value, the percentage between two values, and percentage increases or decreases — with the formula shown.
- MathsUse calculadoraCompound Interest calculadora
Project the future value of savings or investments with compounding, regular contributions and inflation-adjusted returns.
- MathsUse calculadoraSimple Interest calculadora
Calculate simple interest on a loan or savings account using principal, rate and time.
- MathsUse calculadoraPythagoras Theorem calculadora
Find the hypotenuse or a missing side of a right-angled triangle using a² + b² = c².
- FinanceUse calculadoraMortgage Repayment calculadora
Estimate your monthly UK mortgage repayment from loan amount, interest rate and term — with total interest paid over the life of the mortgage.
- FinanceUse calculadoraStamp Duty calculadora (SDLT)
Work out Stamp Duty Land Tax on a UK property purchase — first-time buyer, main residence or additional property — for England and Northern Ireland.
- FinanceUse calculadoraVAT calculadora
Add 20% VAT to a net price, or pull VAT back out of a gross price. Handles the reduced 5% and zero rates too.
- FinanceUse calculadoraCouncil Tax Estimator
Estimate your yearly Council Tax bill from your property band and local council rates.
All categories
Pick a topic. Every calculadora has a plain-English explainer, worked examples and an FAQ.
- Maths
Clear, reliable maths calculadoras for GCSE, A-Level, uni and everyday life. Percentages, areas, trigonometry, statistics and more — with the formulas shown, not hidden.
- Finance
Work out UK mortgages, stamp duty, VAT, compound interest and more. Every calculadora is built around current HMRC and GOV.UK rules, and we show our working.
- Employment
From PAYE take-home pay to National Insurance, student loans and statutory sick pay — UK-specific calculadoras that reflect the current tax year.
- Nutrition
BMI, BMR, daily calories and macros — in metric or imperial, with plain-English context about what the numbers actually mean for your health.
- Dates
Add days, subtract days, work out the difference between two dates, or calculate your age — instant answers with working days and bank holidays accounted for.
- Text
Count characters, words, sort alphabetically, extract keywords, build a word cloud — handy tools for writers, students and SEOs.
- Architecture
Volume of a water tank, ramp gradient for Part M compliance, and other practical tools for architects, builders and DIYers in the UK.
- Health
Body-fat percentage, waist-to-hip ratio, heart-rate zones, pregnancy due date and more — NHS-aligned health calculadoras with the numbers explained in plain English.
- Conversions
Convert length, weight, temperature, volume, speed and currency with precision and context — SI, imperial and UK-specific units side by side.
- Vehicles
Fuel cost per journey, MPG to L/100 km, lease vs buy, UK road tax (VED) and more — practical motoring maths for UK drivers.
- Cooking
Recipe scaling, oven temperature conversion, grams to cups, baking-tin substitution and per-serving calorie maths — kitchen-ready calculadoras.
- Business
Startup and SaaS essentials — MRR, ARR, CAC, LTV, runway, burn rate, break-even and ROI — explained in plain language so founders can act on the numbers.
- Education
Grade calculadoras for GPA, weighted averages, final grades and the mark you need on the next test — ready for GCSE, A-Level, ENEM, SISU and uni.
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Calculadora FAQ
What is Calculadora.co.uk?
Calculadora.co.uk is a free online calculadora for the UK, with more than 100 calculadoras covering tax, finance, maths, health, cooking and more. Every calculadora is written and reviewed by a named UK editor.
Is the Calculadora really free?
Yes. Every calculadora on Calculadora.co.uk is free to use, with no signup, no paywall and no hidden fees. The site is funded by light, UK-relevant ads only.
How accurate are the numbers on Calculadora.co.uk?
All UK tax bands, National Insurance thresholds, stamp duty rates and VAT rules are checked against GOV.UK and HMRC every tax year, and each calculadora shows the formula and worked example so you can audit the result yourself.
Does Calculadora.co.uk work in Portuguese and English?
Yes. Calculadora.co.uk is fully bilingual: every calculadora, guide and FAQ is available in both English (en-GB) and Portuguese (pt-BR).
How often is each Calculadora updated?
UK-specific calculadoras (tax, NI, stamp duty, VAT, student loans) are reviewed at every Budget and at the start of each tax year. Other calculadoras are reviewed at least once a year, with the last-updated date shown on every page.
Does the Calculadora work offline?
Calculadora.co.uk is installable as a Progressive Web App, so once you visit a calculadora it keeps working on your phone or laptop even without signal.
How can I report a bug or suggest a new Calculadora?
Use the contact form on /contact or email hello@calculadora.co.uk. Every correction is logged on the corrections-policy page.
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- Accurate by default
UK tax bands, NI thresholds and rate tables are checked against GOV.UK every tax year.
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No sluggish ads, no pop-ups. calculadoras run locally in your browser.
- Written by people
Every explainer is written by a human editor, not spun out by a robot.