264+ free tools · No account required
Free Tools for Real Life
Calculate, convert, create, check and solve everyday problems instantly. Fast, private and built to be genuinely useful — from percentages and mortgages to QR codes and packing lists.
Start here
Popular tools
The tools people reach for most — each one works instantly in your browser.
Percentage Calculator
PopularWork out any percentage problem in seconds — with the formula shown.
Calculators
Percentage Increase Calculator
PopularFind the percentage increase between two numbers, and the new value after an increase.
Calculators
Percentage Decrease Calculator
PopularWork out a percentage decrease, or reduce a value by a percentage.
Calculators
Age Calculator
PopularCalculate exact age in years, months and days — plus every useful breakdown.
Calculators
Average Calculator
PopularMean, median, mode, range and more for any list of numbers.
Calculators
Fraction Calculator
PopularAdd, subtract, multiply and divide fractions with step-by-step working.
Calculators
Scientific Calculator
PopularA full scientific calculator with brackets, powers, roots, trig and logarithms.
Calculators
Date Calculator
PopularAdd or subtract days, weeks, months or years from any date.
Calculators
Days Between Dates Calculator
PopularCount the exact number of days between any two dates.
Calculators
Business Days Calculator
PopularCount working days between two dates, excluding weekends and holidays.
Calculators
Fuel Cost Calculator
PopularWork out the fuel cost of a trip, and what it costs per person.
Calculators
KG to LBS Converter
PopularConvert kilograms to pounds instantly, with the formula and a conversion table.
Converters
Browse
Every category
Calculators, converters, finance, business, education, time, health, writing, technology, generators and travel.
Calculators22
Everyday maths, percentages, dates and measurements.
Converters115
Length, weight, temperature, data, cooking and more.
Finance23
Loans, mortgages, interest, savings and salary.
Business19
Margins, pricing, payroll, invoicing and growth.
Education8
Grades, GPA, statistics and study planning.
Time & Date42
World clock, dates, durations and countdowns.
Health & Fitness11
BMI, calories, macros, pace and due dates.
Writing & Text16
Count, clean, case-convert and format text.
Technology20
Encoding, formatting, colours and developer utilities.
Generators14
Passwords, random numbers, names and ideas.
Travel6
Trip budgets, fuel costs, distances and time zones.
Right now
Trending tools
Currency Converter
PopularLive exchange rates for 160+ currencies, updated every 30 minutes.
Converters
KG to LBS Converter
PopularConvert kilograms to pounds instantly, with the formula and a conversion table.
Converters
Celsius to Fahrenheit Converter
PopularConvert celsius to fahrenheits instantly, with the formula and a conversion table.
Converters
BMI Calculator
PopularBody mass index with a clear interpretation of the result.
Health & Fitness
Password Generator
PopularCreate strong, random passwords — generated on your device.
Generators
Word Counter
PopularCount words, characters, sentences, paragraphs and reading time.
Writing & Text
Age Calculator
PopularCalculate exact age in years, months and days — plus every useful breakdown.
Calculators
Days Between Dates Calculator
PopularCount the exact number of days between any two dates.
Calculators
Everyday
Most-used tools
The calculations that come up again and again — money, measurements, health and work.
- Percentage CalculatorCalculators
- Currency ConverterConverters
- KG to LBS ConverterConverters
- Celsius to Fahrenheit ConverterConverters
- BMI CalculatorHealth & Fitness
- Word CounterWriting & Text
- Password GeneratorGenerators
- Mortgage CalculatorFinance
- Loan CalculatorFinance
- Days Between Dates CalculatorCalculators
- Age CalculatorCalculators
- Salary CalculatorFinance
Why Velnaro
Built to be useful first
We are not a content farm and not a wall of adverts. Every page exists because someone genuinely needs that calculation.
Free to use
Every tool on VELNARO is free, with no paywall and no trial.
No registration
Open a tool and use it. We never put a sign-up wall in front of an answer.
Fast results
Calculations run in your browser, so results appear as you type.
Mobile friendly
Designed for phones first, and comfortable on desktop and tablets.
Privacy conscious
Most tools never send your data anywhere — it stays on your device.
Accurate calculations
Standard formulas and exact unit definitions, shown on every page.
Regularly updated
New tools, guides and improvements ship continuously.
Works offline
Install VELNARO and keep using your favourite tools without a connection.
Fresh
Recently added tools
Passphrase Generator
Memorable multi-word passphrases with real strength.
Generators
List Shuffler
Randomly shuffle any list of items.
Generators
Random Color Generator
Generate random colours with hex, RGB and HSL values.
Generators
Jet Lag Calculator
How many time zones you cross, and how to adjust.
Travel
Packing Checklist Generator
A printable packing list tailored to your trip.
Travel
Receipt Generator
Create a payment receipt with a reference and total.
Business
Customer Lifetime Value Calculator
What a customer is worth over their whole relationship with you.
Business
Unix Timestamp Converter
PopularConvert between Unix timestamps and readable dates.
Time & Date
HEX to RGB Converter
Convert a hex colour code to RGB, HSL and more.
Technology
Learn
Educational guides
Clear walkthroughs of the calculations people search for, each linking to the tool that does it.
How to Calculate Percentage
Three percentage problems cover almost everything you will ever need: finding a percentage of a number, expressing one number as a percentage of another, and working out a percentage change.
4 min read
How to Calculate Profit Margin
Profit margin tells you how much of every unit of revenue your business keeps. Learn the three margins that matter, and why markup is not the same thing.
5 min read
How to Calculate ROI
Return on investment is the simplest way to compare what you put in with what you got out — and annualising it is what makes different timescales comparable.
4 min read
How to Calculate BMI
Body mass index is a quick screening measure, not a diagnosis. Here is how it is calculated, what the categories mean, and where it falls short.
4 min read
How to Calculate VAT
Adding VAT and removing VAT are not the same calculation. Learn both, plus why subtracting 16% from a gross price gives the wrong answer.
4 min read
How to Calculate Compound Interest
Compound interest is growth on growth. Understand the formula, see how the compounding frequency changes the outcome, and why time beats rate.
5 min read
Everything you need in one place
VELNARO provides free online tools for calculations, conversions, finance, business, education, time, technology, health and everyday tasks. Instead of hunting across a dozen websites for a percentage calculator, a currency converter and a packing list, you can do all of it here — each tool shows its formula and working, so you can trust the answer rather than just read it.
Questions