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Free calculators you can type into and trust
Type numbers on your keyboard, get the right answer instantly, and see exactly how it was worked out — with the formula and a real example on every page.
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Date & time
See all Date & time calculators →Age & Date Calculator
Exact age, days between dates, add days and count working days.
Hijri ↔ Gregorian Converter
Convert dates between the Hijri (Umm al-Qura) and Gregorian calendars.
Today’s Date (Hijri & Gregorian)
Today’s date in the Hijri (Umm al-Qura) and Gregorian calendars.
Days From Today
What date is 30, 60, 90 or any number of days from today.
Age Difference Calculator
The exact age gap between two people in years, months and days.
Time Calculator
Add or subtract hours, minutes and seconds.
Hours Between Two Times
Hours worked between a start and end time, minus breaks.
Countdown to a Date
Live countdown in days, hours and minutes to any date.
Day of the Week Calculator
What day of the week any date was or will be.
Age in Hijri Years
Your exact age on the Hijri calendar from your birth date.
Time Card Calculator
Weekly hours from daily start and end times, with overtime.
Days Between Dates
Count the days between two dates, plus working days.
Salary & Payday Countdown
Days remaining until the next government, pension or private-sector payday.
Zakat Calculator
Zakat on cash, gold, silver and trade goods at 2.5% with your nisab.
Ramadan Countdown
Days left until Ramadan with its expected start date.
Eid al-Fitr Countdown
Days left until Eid al-Fitr and its expected date.
Eid al-Adha Countdown
Days left until Eid al-Adha and the Day of Arafah.
Zakat on Gold Calculator
Zakat on 24k, 22k, 21k and 18k gold by weight and price.
Islamic Inheritance (Mirath) Calculator
Sharia estate distribution (Faraid) for spouses, parents, sons and daughters.
Zakat al-Fitr Calculator
Calculate Zakat al-Fitr in kilograms (Saa') and cash value for your household.
Prayer Times & Imsakiya Calculator
Astronomical Fajr, Sunrise, Dhuhr, Asr, Maghrib, Isha and Imsak times by city.
Qibla Direction & Distance Calculator
Exact Great-Circle Qibla compass bearing in degrees and distance to Makkah.
Finance & money
See all Finance & money calculators →Loan & Mortgage Calculator
Monthly payment (EMI), total interest and a full amortization table.
Compound Interest Calculator
Grow savings with monthly deposits, see interest and inflation.
Overtime Pay Calculator
Hourly wage from salary and overtime pay.
Mortgage Calculator
Monthly payment with taxes, insurance, PMI and HOA.
Car Loan Calculator
Car payment with down payment, trade-in and sales tax.
CD Calculator
Maturity value and interest of a certificate of deposit.
VAT Calculator
Add or remove VAT — Saudi, UAE, Egypt, Bahrain, Oman, UK.
Salary Calculator
Convert pay between hourly, daily, weekly, monthly and yearly.
Margin Calculator
Profit margin, markup and selling price from cost.
End of Service Gratuity Calculator
Calculate end-of-service indemnity for Saudi Arabia, UAE, Egypt, Kuwait, Qatar, Bahrain and Oman.
Social Insurance & GOSI Calculator
Employee and employer social security contributions, net salary and pension estimate.
Income Tax & Net Salary Calculator
Progressive income tax, social security deduction and net take-home pay.
Real Estate Transfer Tax & Stamp Duty Calculator
Property transfer tax (RETT), registration fees and brokerage commission.
Commission & Brokerage Calculator
Sales and real-estate commission, VAT on commission and net seller proceeds.
Annual Leave & Vacation Pay Calculator
Accrued vacation days and unused annual leave cash encashment.
YouTube Money & RPM Calculator
Estimate daily, monthly and yearly YouTube earnings from views, Shorts and RPM.
Google AdSense Revenue Calculator
Calculate website ad earnings from daily pageviews, CTR, CPC and page RPM.
Loan Amortization & Personal Loan Calculator
Monthly loan payment, year-by-year amortization schedule and extra-payment savings.
Investment & Retirement Calculator
Future investment value with monthly contributions, compounding and inflation.
Discount & Sale Price Calculator
Calculate sale price, total savings, stacked double coupons, and find pre-discount original price.
Gold Price Calculator
Price of gold by karat and weight, with making charge and VAT.
Debt-to-Income Ratio Calculator
Your DTI ratio and how much more monthly debt lenders may allow.
Credit Card Payoff Calculator
How long to clear a card balance and the interest you will pay.
Product Pricing Calculator
Calculate selling price, profit margin, markup, platform fees, and tax.
Scientific Calculator
Type any expression on your keyboard — Arabic digits work too.
Percentage Calculator
X% of Y, what percent, percent change, discount and tip.
Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers.
Average Calculator
Mean, median, mode, range and standard deviation of a list.
Rule of Three Calculator
Solve direct and inverse proportions in one step.
Number to Words (Cheque Writer)
Write amounts in Arabic (tafqeet) and English words.
Percentage Change Calculator
Percentage increase or decrease from one value to another.
Percentage Difference Calculator
Difference between two values as a percent of their average.
Slope Calculator
Slope, angle, distance and line equation from two points.
GCF and LCM Calculator
Greatest common factor and least common multiple.
Quadratic Formula Calculator
Solve ax² + bx + c = 0, including complex roots.
Standard Deviation Calculator
Sample and population standard deviation and variance, with every step.
Ratio Calculator
Simplify a ratio, solve A:B = C:?, or split an amount by ratio.
Circle Calculator
Area, circumference, radius and diameter of a circle from any one value.
Z-Score Calculator
Z-score of a value and its percentile under the normal curve.
Sample Size Calculator
How many survey responses you need for a confidence level and margin of error.
Combination & Permutation Calculator
nCr and nPr, with and without repetition, exact for large numbers.
Variance Calculator
Calculate sample and population variance, sum of squares, and step-by-step deviations.
Education & grades
See all Education & grades calculators →GPA Calculator
Term and cumulative GPA on 5-point, 4-point and 4.0 scales.
Weighted Percentage Calculator
University admission weighted percentage from your scores.
GPA to Percentage Converter
Convert a GPA between 4, 5 and 100-point scales.
Grade Percentage Calculator
Turn your marks into a percentage, grade band and the score you need.
Health & pregnancy
See all Health & pregnancy calculators →BMI & Calorie Calculator
Body mass index, healthy weight, BMR, daily calories and body fat.
Pregnancy Due Date Calculator
Due date, pregnancy week and trimester — Gregorian and Hijri.
Ovulation Calculator
Ovulation day and fertile window for your next cycles.
Ideal Weight Calculator
Ideal body weight by four medical formulas and BMI.
Calorie Calculator
Daily calories to lose, keep or gain weight.
Water Intake Calculator
How much water to drink a day for your body and activity.
TDEE Calculator
Calories you burn per day at every activity level.
BMR Calculator
Basal metabolic rate by three formulas.
Macro Calculator
Daily grams of protein, carbs and fat for your goal.
Pace Calculator
Running pace per km and per mile, and speed.
Calorie Deficit Calculator
Daily calorie target for weight loss and exact date to reach your goal weight.
Protein Calculator
Daily protein in grams for your weight and goal, per meal.
Body Fat Calculator
Body fat percentage by the U.S. Navy tape method, with fat and lean mass.
Heart Rate Zone Calculator
Maximum heart rate and the five training zones by age and resting pulse.
A1C to Blood Sugar Calculator
Convert HbA1c to estimated average glucose (mg/dL and mmol/L) with clinical ranges.
Conversion
See all Conversion calculators →Unit Converter
Length, weight, temperature, area, volume, speed, data and time.
Kg to Lbs Converter
Convert kilograms to pounds and pounds to kg.
Cm to Inches Converter
Convert centimetres to inches and inches to cm.
Feet to Meters Converter
Convert feet to metres and metres to feet.
Km to Miles Converter
Convert kilometres to miles and miles to km.
Celsius to Fahrenheit
Convert °C to °F and °F to °C.
mL to Oz Converter
Convert millilitres to US fluid ounces and back.
Cm to Feet and Inches
Height in centimetres to feet and inches, and back.
Everyday life
See all Everyday life calculators →Fuel Cost Calculator
Fuel cost of a trip, round trip and cost per passenger.
Unit Price Calculator
Which pack is cheaper per gram, litre or piece.
Tip Calculator
Tip amount and bill split, with rounding up.
Square Footage Calculator
Area in square feet, square metres and acres.
Concrete Calculator
Concrete volume for a slab and bags needed.
AC BTU & Room Size Calculator
Calculate the right air conditioner size in BTU, tons, and HP for any room.
Electricity Bill & Appliance Cost Calculator
Calculate monthly electric utility bills by country slabs and estimate appliance kWh consumption.
Tile & Flooring Calculator
Calculate tile boxes, individual tiles, layout waste, and sand bedding volume.
Paint Calculator for Walls & Rooms
Calculate liters and cans of paint required for room walls, minus doors and windows.
Rebar Weight & Steel Quantity Calculator
Calculate nominal weight per meter, single bar weight, and bar count per metric ton for steel rebar.
Fuel Economy Calculator
Km per litre, L/100 km and mpg from a trip, plus range per tank.
Speed Distance Time Calculator
Find speed, distance or travel time from the other two.
CBM Freight Calculator
Calculate cubic meters, cubic feet, dimensional weight and container fit.
Why people use Anubis Calc
Keyboard-first
Every field is a real input. Type 12.5*4, press Enter, done — Arabic digits ٠–٩ work too.
Accurate and shown
Each page shows the formula, a worked example and its sources, so you can check the answer yourself.
Private by design
Calculations run on your device. Nothing you type is uploaded or stored on a server.
Fast everywhere
Light pages that work well on slow mobile connections, in light and dark mode.
Frequently asked questions
Are these calculators free?
Yes. Every calculator is free to use with no sign-up and no limits.
Is anything I type sent to a server?
No. All calculations run in your browser. Read the details in our privacy policy.
Can I use my keyboard and Arabic numbers?
Yes. Every number field accepts typed input, including Arabic-Indic digits (٠١٢٣٤٥٦٧٨٩) and the Arabic decimal mark ٫.
How accurate are the results?
The formulas are tested against known answers before every release. Money is calculated in whole cents to avoid rounding errors. Results are estimates; see our disclaimer.
Do the calculators work offline or on mobile?
They work on any modern phone, tablet or computer. Once a page has loaded, the calculation itself needs no internet connection.