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35+ free calculators for BMI, mortgage, VAT, salary and more. Precise, fast, always up to date.
New & Updated 2026
Fresh tools updated with the latest rates and regulations
VAT Calculator UK/EU
Calculate VAT for any rate — UK 20%, EU standard and custom rates
Calculate → NewUK Salary After Tax 2026
PAYE, National Insurance, student loans — gross to net instantly
Calculate → NewGrade Calculator
Calculate your GPA, weighted grades and final exam scores
Calculate → NewTime Card Calculator
Track work hours, overtime and weekly totals effortlessly
Calculate → UpdatedBMI Calculator 2026
Body Mass Index with healthy weight range and personalized tips
Calculate → NewWater Intake Calculator
Daily hydration needs based on weight, activity and climate
Calculate →Find the Right Calculator
Choose a category and find the tool you need instantly
Finance & Money
Mortgage, salary, loans, investments, VAT and more. Updated 2026.
Health & Fitness
BMI, calories, TDEE, ideal weight and all the tools for your wellness.
Everyday Tools
Percentages, unit converter, electricity cost, grade calculator and more.
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No sign-ups, no pop-ups, no personal data. Just calculations.
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We never store your data. All calculations happen in your browser.
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Optimized for mobile, tablet and desktop. No app needed.
From the CalcFast Blog
Practical guides on finance, health and everyday calculations
How to Calculate Your Net Salary in 2026
Tax brackets, NI contributions and 4 practical examples.
Read the guide → HealthBMI: What Your Score Really Means
Beyond the number — body composition, limitations and action plan.
Read the guide → ToolsVAT Calculator: UK & EU Guide 2026
Standard rates, reduced rates, and how to calculate VAT correctly.
Read the guide → FinanceUK Salary After Tax: Complete 2026 Guide
PAYE tables, NI thresholds, student loans and take-home pay.
Read the guide →The Most Reliable Free Calculator Platform Online
CalcFast offers 35+ free calculators updated for 2026. From mortgage and VAT to BMI and grade calculators — everything you need in one place, no sign-up required, no intrusive ads.