All the Calculations You Need
In One Place
75+ tools across 6 categories including finance, health, home & life and education. Find what you need, get accurate results in seconds. Completely free.
Finance & Investment
Loan Calculator
Monthly payment, total repayment and amortization schedule
CalculateDeposit Interest Calculator
Net yield and 15% withholding tax calculation
CalculateRent Increase Calculator
CPI-based rent increase rate and new rental amount
CalculateHealth & Fitness
BMI Calculator
Body mass index and healthy weight range
CalculateDaily Calorie Need
BMR and TDEE calculation (Mifflin-St Jeor)
CalculateIdeal Weight Calculator
Ideal weight via Devine, Hamwi and BMI formulas
CalculateSalary, Work & Career
Salary Calculator
All SGK and tax deductions from gross to net salary
CalculateAnnual Leave Calculator
Annual leave entitlement and balance by seniority
CalculateOvertime Pay Calculator
Overtime wage calculation based on hourly rate
CalculateDate, Time & Calendar
Age Calculator
Exact age in years, days and weeks from birth date
CalculatePrayer Times
Daily prayer times by city
CalculateDate Difference Calculator
Days, weeks, months, years and business days between dates
CalculateMarketing & Analytics
ROAS Calculator
Return on ad spend calculation
CalculateConversion Rate (CR)
Visitor-to-customer conversion rate
CalculateCAC Calculator
Customer acquisition cost calculation
CalculateMath & Numerical
Percentage Calculator
Percentage increase, decrease and ratio calculations
CalculateStandard Deviation
Standard deviation and variance of a data set
CalculateOnline Calculator
Calculator for basic arithmetic operations
CalculateEducation
University GPA Calculator
GPA and cumulative GPA from course grades and credits
CalculateMean, Median, Mode
Central tendency measures of a data set
CalculateRandom Number Generator
Generate random numbers or lists in a given range
CalculateEvents & Lifestyle
Fuel Cost Calculator
Fuel cost by distance and consumption rate
CalculateTyping Speed Calculator
WPM and words-per-minute typing speed test
CalculateReading Time Calculator
Estimated reading time based on text length
CalculateEngineering & Technical
TV Size Calculator
Ideal TV size based on viewing distance
CalculateArea Calculator
Rectangle, triangle and circle area calculation
CalculateLighting Calculator
Lumen and bulb count needed for a room
CalculateUnit Converters
Length Converter
Convert mm, cm, m, km, inches, feet, yards and miles
CalculateWeight Converter
Convert mg, g, kg, tonnes, ounces, pounds and stone
CalculateSize to Weight Converter
Convert volume to weight using material density
CalculateClothing & Sizing
Bra Size Calculator
Bra size from bust and underbust measurements
CalculateBelt Size Calculator
Correct belt size from waist measurement
CalculateJacket Size Calculator
Jacket and suit size from chest measurement
CalculatePets
Cat Age Calculator
Convert your cat's age to human years
CalculateDog Age Calculator
Convert your dog's age to human years
CalculateCat Pregnancy Calculator
Expected birth date from mating date
CalculateHome, Decor & Construction
Paint Calculator
Paint quantity needed based on room size and coats
CalculateElectricity Bill Calculator
Device power, usage time and energy cost
CalculateTax & Bills
Withholding Tax Calculator
Rent and freelance withholding tax deduction
CalculateVAT Calculator
VAT-inclusive / exclusive price conversion
CalculateDividend Calculator
Dividend yield and 10% withholding tax calculation
CalculateFrequently Asked Questions
What is NumerSpace?
NumerSpace is an independent platform offering 90+ free online calculators designed for finance, health, time and daily life. No registration or membership required — all tools run instantly in your browser.
What Categories Are Available?
Finance tools for loans, deposits, zakat and inflation; Health tools for BMI, calories and clothing size; Religious tools for prayer times and Hijri calendar; Business & Tax tools for salary, VAT and rent increase, and much more.
Is My Data Safe?
All calculations happen entirely in your browser — the data you enter is never sent to or stored on our servers. We do not ask for an ad account, personal information or email address.