30+ Clean, Fast Online Calculators

Solve everyday math, finance, time, and solid geometry problems in one place. No sign-up, no ads, just instant answers in your browser.

Basic & scientific · Loan & EMI · Time & date · Volume & surface area

⚡ Instant results 📱 Mobile ready 🧮 30+ calculators planned

🧮Math calculators

Quick arithmetic, percentages, and equations

➗Basic calculator

Perform fast addition, subtraction, multiplication, and division.

+ − × ÷ Keyboard input

Ideal for quick checks.

📊Percentage tools

Find X% of Y, percentage change, and discounts in seconds.

% of value Discount

Shopping & reports.

📐Quadratic solver

Solve equations of the form ax² + bx + c = 0 with real roots.

Algebra Roots

Study helper.

💰Finance & loan calculators

Interest, EMI, and investment growth

📄Simple interest

Compute interest and total amount for simple rate loans.

I = P r t

Short-term loans.

🏦EMI calculator

Estimate monthly payments for home, car, and personal loans.

EMIMonthly

Loan planning.

📈Compound growth

See how savings grow with compounding over time.

Future value

Investing basics.

⏱️Time & date calculators

Date differences, age, and durations

🎂Age finder

Calculate exact age in years, months, and days.

Birthdays & forms.

📅Date difference

Find days between two calendar dates.

Deadlines & schedules.

📐Solid geometry calculators

Volume and surface area of 3D shapes

🛢️Cylinder volume

Compute volume of a right circular cylinder from radius and height.

Volumeπ r² h

Liquid & storage.

⚪Cone & sphere tools

Find volume and area for cones and spheres.

ConesSpheres

Math & physics.

📦Prisms & boxes

Volume and surface area for cubes and rectangular prisms.

CubesPrisms

Packing & build.

❤️Health calculators

Track BMI, BMR and calories

⚖️BMI checker

Estimate body mass index from height and weight.

BMI Weight range

General awareness only.

🔥BMR & calories

Approximate daily calories using a simple BMR + activity factor.

BMR Calories

Fitness planning.

⚕️Health note

These tools are estimates only and do not replace medical advice.

Info only

Talk to your doctor.

🧰Other calculators

Dates, study, time and utilities

🎂Age calculator

Find exact age from date of birth to today’s date.

Age

Everyday planning.

📅Date calculator

Get years, months and days between two calendar dates.

Dates

Schedules & events.

⏱️Time calculator

Add or subtract clock times and find duration between two times.

Time

Work shifts & tasks.

🕒Hours calculator

Convert total minutes into hours and minutes.

Hours

Timesheets & logs.

🎓GPA calculator

Combine course grade points and credits to estimate GPA.

GPA

Students & colleges.

📚Grade target

See what score you need on the final to reach a target course grade.

Grade

Exam planning.

🏗️Concrete calculator

Estimate concrete volume for simple slabs from length, width and depth.

Concrete

DIY & construction.

🌐Subnet calculator

Quickly see network and broadcast addresses from an IPv4 CIDR.

Subnet

Networking basics.

🔑Password generator

Create random mixed-character passwords at your chosen length.

Password

Account security.

🔁Conversion calculator

Start with a simple km-to-miles converter and add more units later.

Conversion

Everyday units.