Can I use CalcDesk on mobile?

Yes. CalcDesk is fully responsive and works on phones, tablets, and desktops.

How do I calculate BMI (body mass index)?

Divide your weight in kilograms by your height in metres squared. CalcDesk's BMI calculator does this instantly and also shows your healthy weight range.

How do I calculate percentage increase or decrease?

Percentage increase or decrease is the change in value divided by the original value, multiplied by 100. CalcDesk's percentage calculator handles increase, decrease, difference, and reverse-percentage cases.

What is the difference between simple and compound interest?

Simple interest is calculated only on the principal amount, while compound interest is calculated on the principal plus any interest already earned, so it grows faster over time. CalcDesk has separate calculators for both.

15 calculators, zero clutter

Every number you need to work out, in one fast desk.

CalcDesk bundles the calculators people actually search for — standard, scientific, EMI, BMI, unit and currency conversion, and more — into one clean, accurate, distraction-free hub. Nothing to install, nothing sent to a server.

15calculator tools

0sign-ups required

100%runs in your browser

Quick calculatorStandard

All calculators

15 tools

Standard & Scientific

Arithmetic, trig, logs, powers, memory.

Percentage

X% of Y, increase, decrease, reverse.

Age Calculator

Exact age plus next-birthday countdown.

BMI Calculator

Body mass index and healthy weight range.

Geometry

Area & perimeter for 7 common shapes.

Unit Converter

Length, weight, temperature, and more.

Loan / EMI

Monthly instalment, interest & total cost.

Discount

Final price and total savings.

GST / VAT

Add or remove tax from any amount.

Tip Calculator

Split a bill and calculate the tip.

Simple Interest

Interest and total repayment amount.

Compound Interest

Daily, monthly, quarterly, or yearly.

Currency Converter

Live exchange rates between currencies.

Date Difference

Days, weeks, months between two dates.

Standard & Scientific Calculator

Arithmetic, powers, roots, trigonometry, logarithms, and memory functions.

Also known as: online calculator, basic calculator, math calculator, scientific calculator online.

Percentage Calculator

Five common percentage problems, solved instantly.

Also known as: percent calculator, % calculator, percentage increase/decrease calculator, percentage off calculator.

Percentage (%)

Of value

Result 0

Age Calculator

Exact age in years, months and days, plus totals and your zodiac sign.

Also known as: how old am I calculator, age calculator by date of birth, birthday calculator.

Date of birth

As of date

Age —

BMI Calculator

Body mass index, category and healthy weight range.

Also known as: body mass index calculator, ideal weight calculator, healthy weight calculator.

Height (cm)

Weight (kg)

BMI —

Geometry Calculator

Area and perimeter for the shapes people look up most.

Also known as: area calculator, perimeter calculator, circle/triangle/rectangle area calculator, square footage calculator.

Radius

Arc angle (°, optional)

Area 0

Unit Converter

Length, weight, temperature, area, volume, speed, time, pressure, energy, and data storage.

Also known as: length converter, weight converter, cm to inches, kg to lbs, celsius to fahrenheit converter.

Loan / EMI Calculator

Monthly instalment on a fixed-rate loan.

Also known as: EMI calculator, loan calculator, mortgage calculator, home loan calculator, car loan calculator.

Loan amount (Rs)

Annual interest rate (%)

Loan period (years)

Monthly EMI Rs 0

Discount Calculator

Final price and how much you save.

Also known as: sale price calculator, percent off calculator, savings calculator.

Original price (Rs)

Discount (%)

Final price Rs 0

GST / VAT Calculator

Add tax to a base price, or extract it from a tax-inclusive total.

Also known as: GST calculator, VAT calculator, sales tax calculator, tax calculator.

Amount (Rs)

Tax rate (%)

Total with tax Rs 0

Tip Calculator

Work out the tip and split the bill between everyone at the table.

Also known as: bill split calculator, gratuity calculator, restaurant tip calculator.

Bill amount (Rs)

Tip (%)

Split between (people)

Each person pays Rs 0

Simple Interest Calculator

Interest earned or owed over a fixed period.

Also known as: interest calculator, principal-rate-time calculator.

Principal (Rs)

Rate (% per year)

Time (years)

Interest Rs 0

Compound Interest Calculator

See how interest compounds daily, monthly, quarterly, or yearly.

Also known as: investment growth calculator, savings growth calculator.

Principal (Rs)

Rate (% per year)

Time (years)

Compounding frequency

Interest earned Rs 0

Currency Converter

Live exchange rates, updated each time you change the source currency.

Also known as: exchange rate calculator, USD to PKR converter, money converter.

Amount

From

Converted amount —

Date Difference Calculator

Exact time between two dates.

Also known as: date calculator, days between dates calculator.

Start date

End date

Total days —

Frequently asked

Is CalcDesk free to use?

Yes — every calculator is free, with no sign-up required.

Does CalcDesk store my calculations?

No. All calculations run locally in your browser.

Can I use it on mobile?

Yes — CalcDesk is fully responsive on phones and tablets.

How do I calculate BMI?

Weight (kg) ÷ height (m)². The BMI calculator above does it instantly with your category and healthy range.

How do I calculate EMI on a loan?

From loan amount, interest rate, and tenure using the reducing-balance formula — see the EMI calculator above.

How do I calculate percentage increase?

(New value − old value) ÷ old value × 100. Try it in the percentage calculator above.

How do I calculate GST or VAT?

Add tax: amount × (1 + rate/100). Remove tax: amount ÷ (1 + rate/100). Both are built into the GST/VAT calculator.

Simple vs. compound interest — what's the difference?

Simple interest applies only to the principal; compound interest also earns interest on prior interest, growing faster.