Math & Numbers
Calculate a trimmed mean by removing the same percentage of low and high values before averaging
trimmed-mean-calculatorMath & Numbers
Calculate sample variance, population variance, and optional standard deviation for a numeric dataset
variance-calculatorMath & Numbers
Calculate tips and split bills between multiple people with customizable tip percentages
tip-calculatorMath & Numbers
Convert between different time units (seconds, minutes, hours, days, weeks, etc.)
time-converterDate & Time
Add or subtract time from a date
time-adder-subtractorDate & Time
Format time duration into various human-readable formats
time-duration-formatterMath & Numbers
Calculate trigonometric functions (sin, cos, tan)
trigonometry-calculatorFinance
Split bills by items with individual amounts and custom tip percentages per person
tip-calculator-splitFinance
Calculate VAT (Value Added Tax) for purchases and sales
vat-calculatorMath & Numbers
Compute engineering tensile strength σ_uts = F_max/A₀, yield strength σ_y = F_y/A₀ (optional), and the yield ratio σ_y/σ_uts from a uniaxial tension test. Forces in kN, area in mm² → stress in MPa. A₀ is the original cross-section. Yield ratio <0.55 high ductility, 0.55–0.85 moderate, >0.85 low ductility.
tensile-strength-calculatorMath & Numbers
Convert points earned and total points into a test score percentage, points lost, and letter grade
test-score-percentage-calculatorFinance
Find, convert and normalize currency values within text content
text-currency-normalizer