🔢 Scientific Calculator

Supports basic operations, trig functions, logarithms, powers

0

💰 Interest Calculator

Calculate monthly payment, total interest, supports equal payment and equal principal

1 Year 3 Years 5 Years 10 Years 20 Years 30 Years

🌐 Subnet Calculator

Calculate network address, broadcast address, usable hosts

. . .
/8 (Class A) /16 (Class B) /24 (Class C) /25 /26 /27 /28 /30

📏 Length Converter

Convert meters, cm, inches, feet, miles, nautical miles

⬛ Area Converter

Convert sq meters, hectares, acres, sq feet

📦 Volume Converter

Convert liters, milliliters, cubic meters, gallons

🌡️ Temperature Converter

Convert Celsius, Fahrenheit, Kelvin

⏱️ Time Converter

Convert seconds, minutes, hours, days, weeks, months, years

🚀 Speed Converter

Convert m/s, km/h, mph, knots, Mach

💾 Data Size Converter

Convert bytes, KB, MB, GB, TB, PB

🎈 Pressure Converter

Convert Pascal, Bar, atm, PSI

⚡ Power Converter

Convert Watts, Kilowatts, Horsepower, BTU/h

🔥 Energy Converter

Convert Joules, Calories, kcal, kWh, BTU

📐 Angle Converter

Convert degrees, radians, gradians, turns

🧊 Density Converter

Convert kg/m3, g/cm3, lb/ft3

💪 Force Converter

Convert Newton, kN, dyne, lbf, kgf

✨ Features

🔒 100% Free & Private

No ads, no signup, no watermark. Everything runs locally in your browser. Your data never leaves your device.

📏 Unit Conversion

16 unit types including length, area, volume, temperature, speed

💰 Interest Calculation

Supports deposit rate, loan rate, compound interest

🌐 Subnet Mask

IP address and subnet calculation, essential for network planning

FAQ

What functions does the scientific calculator support?

Supports sin, cos, tan, log, ln, factorial, power, square root and more. Keyboard input supported: Enter to calculate, Escape to clear.

What types of unit conversion are supported?

Supports 16 types: length, area, volume, temperature, time, speed, pressure, power, energy, angle, data size, density, force. Each includes multiple common units.

How to use the subnet mask calculator?

Enter IP address and subnet mask or CIDR (e.g., /24). The tool calculates network address, broadcast address, host range, host count, wildcard mask, and binary IP.

How to use the interest calculator?

Enter principal, rate and term, select repayment method. The tool calculates monthly payment, total payment, and total interest. Equal principal also shows first/last month payment and monthly decrease.

What is the calculation precision?

Uses JavaScript floating-point arithmetic with precision of about 15-17 significant digits. Unit conversion results automatically remove trailing zeros.

Is this tool really free? Is it safe?

Yes, this tool is 100% free with no ads, no signup, no usage limits, and no watermarks. All processing happens in your browser — your data never leaves your device. It's completely safe and private.

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