Math & Numbers
Convert feet to miles with configurable decimal precision
feet-to-mileMath & Numbers
Calculate the score needed on a final exam to reach a desired overall course grade
final-grade-calculatorMath & Numbers
Run Fisher exact test for a 2 x 2 contingency table with exact one-sided or two-sided p-values
fisher-exact-test-calculatorMath & Numbers
Calculate PDF, CDF, survival probability, and interval probability for an exponential distribution
exponential-distribution-calculatorMath & Numbers
Calculate n! for a non-negative integer with exact BigInt output, optional steps, and related values such as trailing zeros
factorial-calculatorMath & Numbers
Convert Fahrenheit to Celsius with configurable decimal precision
fahrenheit-to-celsiusMath & Numbers
Convert feet to meters with configurable decimal precision
feet-to-meterMath & Numbers
Generate Fibonacci sequence with customizable start numbers, length, and output format. Includes golden ratio analysis and mathematical properties.
fibonacci-generatorMath & Numbers
Exact φ(n) from trial-division factorization (n ≤ 10¹²) with optional coprime listing and Euler's theorem recall.
euler-totient-functionMath & Numbers
Convert dilution notations 1:X ↔ 1/X ↔ percent, with dilution factor, parts, and mixing volumes.
dilution-ratio-converterMath & Numbers
Explicit Euler integration for dy/dx = f(x, y): step table, final estimate, and optional exact-solution error column.
euler-method-solverMath & Numbers
Convert dynamic (absolute) viscosity between Pa·s (pascal-second, SI base, = N·s/m² = kg/(m·s)), cP (centipoise, 1 cP = 0.001 Pa·s), and lbf·s/ft² (imperial, 1 = 47.88025898 Pa·s). Converts via Pa·s to the target unit and also lists the equivalent value in all three units for reference. Reference values: water 20°C ≈ 1.002 cP, glycerol 20°C ≈ 1412 cP, air 20°C ≈ 0.0181 cP.
dynamic-viscosity-converter