Calculators

Calculates the hydrogen ion concentration ([H+]) of a solution given its pH value. This is a fundamental calculation in chemistry for understanding acidity and basicity.

Estimates how long an oxygen tank will last based on its size, pressure, and flow rate.

Calculates the target heart rate zone for fat burning during exercise, based on age and resting heart rate.

Estimates calories burned based on average heart rate during activity (use with caution, accuracy varies).

Calculates the maximum vertical height reached by a projectile, given its initial velocity and launch angle.

Estimates recommended daily fat intake based on total calorie goals.

Estimates your daily calorie needs for weight maintenance, loss, or gain based on your activity level, gender, age, height, weight, and goals.

Calculates the estimated travel time and arrival time for a car trip, based on distance and speed.

Calculates the static and dynamic compression ratios of an internal combustion engine. Static compression ratio is based on the engine's physical dimensions, while dynamic compression ratio considers valve timing.

Calculates the volume of concrete needed for tube blocks, based on the tube diameter and height. It also estimates the amount of cement needed, assuming a standard mix ratio.