Free online physics, Math calculators, velocity equations and density, mass and … Puts the values and the calculator will solve for the third in the selected units.

Pump head calculator: Online pump head calculator. Pressure to Head Formulas: Imperial Units: H=(2.31 * (P)) /SG where: H= Head, ft. P= Pressure, psi. SG= Specific Gravity. SI Units: H=(10.2... Read more

Sales Tax Calculator online. How to calculate Sales Tax: Multiply the price before tax by the percentage sales tax in order to find out the total cost. The equation looks like this: price be... Read more

Use our online API Gravity Calculator. API Gravity Formulas: API = (141.5 / SG) – 131.5. SG = 141.5 / (API + 131.5). where: SG: Specific Gravity (at 60oF). API :Degrees API Gravity. AP... Read more