Calculators

Estimates the weight of a freshly cut log based on its diameter and length. This calculator assumes the log is from a typical hardwood tree with a density of approximately 50 lbs/cubic foot.

Calculates the materials needed for board and batten siding, including boards, battens, and fasteners.

Calculates the pH of a buffer solution using the Henderson-Hasselbalch equation.

Calculates the percentage by mass of each element in a chemical compound.

Converts numbers between standard decimal notation and scientific notation.

Calculates the relative risk, comparing the probability of an outcome in an exposed group to the probability in an unexposed group.

Calculates Metabolic Equivalents (METs) achieved during a Bruce Protocol treadmill stress test.

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

Estimates calories burned during an elliptical workout based on weight, workout time, and intensity level.

Calculates the tension in a string, cable, or similar object based on the mass and acceleration.