Math & science

Convert between diopters and focal length. Calculate lens power for eyeglasses, contact lenses, and optical systems.

Estimate total render time for 3D animations and projects based on frame render time, frame count, and render farm nodes

Calculate Equivalent Isotropically Radiated Power (EIRP) from transmit power, antenna gain, and cable loss. Essential for RF engineers and wireless network planning.

Calculate probabilities for single events.

Instantly convert numbers to and from millions. Enter 1 and get 1,000,000 — no need to count zeros. Fast, simple million number converter.

Instantly convert numbers to and from billions. Enter 1 and get 1,000,000,000 — no need to count zeros. Fast, simple billion number converter.

Instantly convert numbers to and from trillions. Enter 1 and get 1,000,000,000,000 — no need to count zeros. Fast, simple trillion number converter.

Instantly convert numbers to and from quadrillions. Enter 1 and get a number with 15 zeros — no need to count zeros. Fast, simple quadrillion number converter.

Instantly convert numbers to and from quintillions. Enter 1 and get a number with 18 zeros — no need to count zeros. Fast, simple quintillion number converter.

Instantly convert numbers to and from sextillions. Enter 1 and get a number with 21 zeros — no need to count zeros. Fast, simple sextillion number converter.

Instantly convert numbers to and from septillions. Enter 1 and get a number with 24 zeros — no need to count zeros. Fast, simple septillion number converter.

Instantly convert numbers to and from octillions. Enter 1 and get a number with 27 zeros — no need to count zeros. Fast, simple octillion number converter.

Instantly convert numbers to and from nonillions. Enter 1 and get a number with 30 zeros — no need to count zeros. Fast, simple nonillion number converter.

Instantly convert numbers to and from decillions. Enter 1 and get a number with 33 zeros — no need to count zeros. Fast, simple decillion number converter.

Convert dog age to an equivalent human age using a life-stage based formula.

Convert human years to cat years using a life-stage based formula.

Analyze the time and space complexity (Big-O notation) of any code using AI

Connect a RadiaCode radiation detector over Bluetooth and watch its dose rate, count rate, accumulated dose, battery and temperature live in your browser. Chart the readings and export them as CSV or JSON.

Read the gamma spectrum of a RadiaCode over Bluetooth and plot counts by energy on a linear or logarithmic scale. Refresh it automatically, reset it, and export every channel as CSV or JSON.

Calculate number of floors, building height, or floor height from any two known values. Also computes ceiling clear height, stair steps per floor, and total stair steps.

Calculate the total number of pixels in a resolution by entering width and height. Includes presets for common display resolutions like 1080p, 4K, and 8K.

Generate palindrome numbers with configurable digit count, base (decimal, binary, octal, hexadecimal), and quantity.

Interactive angle measurer with a draggable protractor. Displays degrees, radians, complementary and supplementary angles.

A simple calculator for arithmetic expressions — addition, subtraction, multiplication, and division.