Free Online Calculators & Converters

Fast, accurate, no sign-up tools that run entirely in your browser. Pick a tool below to get started.

Finance & Money

📊

Percentage Calculator

Find percentages, increases, decreases and ratios instantly.

🏦

Loan / EMI Calculator

Estimate monthly payments and total interest on any loan.

🏠

Mortgage Calculator

Estimate your total monthly mortgage payment including tax and insurance.

📈

Compound Interest Calculator

See how your savings or investment can grow over time.

💵

Salary Calculator

Convert your pay between hourly, daily, weekly, monthly and annual amounts.

🏷️

Discount & Tip Calculator

Work out sale prices, savings and restaurant tips in seconds.

🧾

VAT Calculator

Add 15% VAT to a price or extract it from a VAT-inclusive total.

💡

Electricity Cost Calculator

Estimate how much it costs to run an appliance per day, month and year.

⛽

Fuel Cost Calculator

Estimate how much fuel a trip will cost based on distance and consumption.

Islamic & Saudi Tools

🌙

Hijri Date Converter (محول هجري/ميلادي)

Convert between Hijri and Gregorian dates using the Umm al-Qura calendar.

📿

Ramadan & Eid Countdown

How many days until Ramadan, Eid al-Fitr, Arafah and Eid al-Adha (Umm al-Qura).

🕌

Zakat Calculator (حاسبة الزكاة)

Calculate the Zakat due on your cash, gold and investments against the nisab.

💼

End of Service Calculator

Estimate your gratuity under Saudi Labor Law from your wage and service period.

⏱️

Overtime Calculator

Overtime pay with the 50% premium required by Saudi Labor Law Article 107.

Health & Fitness

⚖️

BMI Calculator

Check your Body Mass Index using metric or imperial units.

🔥

Calorie Calculator

Estimate your daily calorie needs to maintain, lose or gain weight.

🏃

Ideal Weight Calculator

Find your ideal body weight from height and sex using four formulas.

📏

Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy method.

😴

Sleep Calculator

Find the best bedtime or wake-up time based on 90-minute sleep cycles.

🤰

Pregnancy Due Date Calculator

Estimate your due date, pregnancy week and trimester from your last period.

Dates & Time

🎂

Age Calculator

Calculate exact age in years, months and days from any birth date.

⏳

Live Age Counter

Watch your exact age tick by live — down to the second.

📅

Date Difference Calculator

Find the exact number of days, weeks or months between two dates.

🕐

Time Zone Converter

Convert a date and time between any two time zones worldwide.

Education & Math

🎓

GPA Calculator

Calculate semester and cumulative GPA on a 5.0 or 4.0 scale.

📝

Grade Calculator

Calculate your weighted grade, or what you need on the final exam.

📊

Statistics Calculator

Calculate mean, median, mode, range and standard deviation.

Text, Code & Converters

📐

Unit Converter

Convert length, weight and temperature between metric and imperial.

🌡️

Temperature Converter

Convert temperatures instantly between Celsius, Fahrenheit and Kelvin.

📝

Word & Character Counter

Count words, characters, sentences and reading time as you type.

🔤

Text Case Converter

Switch text between UPPERCASE, lowercase, Title Case and more.

🔐

Password Generator

Create strong, random passwords with custom length and rules.

📱

QR Code Generator

Turn any text or link into a scannable QR code and download it.

🎲

Random Number Generator

Generate random numbers in any range, with optional no-repeat mode.

🎨

Color Converter

Convert colors between HEX, RGB and HSL with a live preview.