CalculationsFeatured
Percentage Calculator
Calculate a percentage from a base amount online for free in seconds.
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Calculations
Simple and fast calculators for percentages, totals and recurring numbers.
This category brings together calculators for everyday numbers that need a fast and reliable answer. It is useful for pricing, age checks, taxes and quick comparisons where mental math is too slow or too easy to get wrong.
Important notice
The tools in this category are provided for informational purposes only. Results may be inaccurate, outdated or incomplete, and should not be treated as financial, tax, legal or business advice.
Read full disclaimerWhat you will find in this category
- Percentage and discount calculators
- Age and date based checks
- VAT and amount breakdown tools
- Simple utilities for recurring business calculations
All available tools
CalculationsFeatured
VAT Calculator
Add or remove VAT from an amount online for free in seconds.
Open toolCalculations
Age Calculator
Calculate age, next birthday and remaining days online for free.
Open toolWhen to use these tools
- When checking totals, percentages or taxes before sending numbers
- While comparing discounts, increases or net amounts
- When forms or workflows depend on exact age thresholds
- Any time you want a faster answer than manual math
Articles and practical guides
Calculations3 min
When an age calculator is actually useful
A practical guide to age calculation, reference dates and why an age calculator is useful for birthdays, forms and everyday checks.
Read articleCalculations3 min
Chronological age vs exact age: when the difference matters
A practical guide to chronological age and exact age, with reference dates, forms and threshold checks that need a precise result.
Read articleCalculations3 min
How to calculate a percentage in a few seconds
A simple guide to understand what a percentage means and apply it to discounts, increases and quick comparisons.
Read articleCalculations3 min
Percentage increase vs percentage decrease: the practical difference
A practical guide to percentage increase and percentage decrease, common mistakes, price comparisons and how to avoid wrong results.
Read articleTax4 min
VAT at 22%: quick guide with practical examples
How to move from net amount to total and back again without mixing up tax rate, taxable base and tax.
Read articleCalculations3 min
VAT included vs VAT excluded: what changes in the final price
A practical guide to net amount, gross amount and the most common quote and invoice mistakes when VAT is included or excluded.
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