Half-Life Calculator: Exponential and Radioactive Decay
Calculate remaining or initial quantity, elapsed time, half-life, decay constant, mean lifetime and decay percentages.
Molecular Weight Calculator: Formula, Molar Mass and Composition
Calculate molecular weight, molar mass, element counts and mass percentages from a chemical formula, with optional mass-to-moles conversion.
Dilution Calculator: C1V1, C2V2 and Serial Dilutions
Solve C1V1 = C2V2 for any one unknown or generate a serial-dilution schedule with factors, concentrations and transfer volumes.
Carpet Calculator: Rolls, Seams, Pattern Repeat and Cost
Estimate broadloom carpet cuts, seams, linear length, square yards or square metres and cost from room dimensions, roll width and pattern repeat.
Pace Calculator: Running Pace, Time, Distance and Speed
Calculate running pace, elapsed time or distance with min/km, min/mile and speed conversions plus same-pace reference times.