Ratio Calculator
Simplify ratios, compare ratios, solve a missing value, and list equivalent ratios with clear steps and exact decimal handling.
Sam Gorman
Log Calculator
Find log values or solve for x using base 10, e, 2, or a custom base with clear domain checks and equation form.
Quadratic Formula Calculator
Solve ax^2 + bx + c = 0, see both roots, the discriminant, root type, and optional step-by-step work.
Standard Deviation Calculator
Calculate sample or population standard deviation from a list of numbers, with cleaned values, mean, variance, and step summary.
Big Number Calculator
Do exact math with huge integers and high-precision decimals, with scientific notation, digit count, and exact-vs-rounded results.
Gold Weight Calculator
Estimate gold weight from size or find pure-gold content from measured weight in grams, troy ounces, ounces, and dwt.
Factor of Safety Calculator
Calculate factor of safety, allowable stress or load, required strength, and working value with clear yield vs ultimate basis guidance.
Elongation Calculator
Calculate elongation, engineering strain, percent elongation, true strain, and elastic extension with clear length-based or load-material modes.
Elastic Constants Calculator
Enter any 2 isotropic elastic constants to solve E, G, K, nu, and lambda with unit conversion and stability checks.
Density Calculator
Calculate density, mass, or volume with unit conversion and optional water displacement for irregular objects.