01 ƒx Math & science Scientific calculator Arithmetic, powers, roots and trigonometric functions.
Use now → 02 % Math & science Percentage calculator Find any percentage of a number instantly.
Use now → 03 DOB Health & everyday Age calculator Calculate exact age in years, months and days.
Use now → 04 ↔ Math & science Length converter Convert metric and imperial length measurements.
Use now → 05 Δd Health & everyday Date difference Count days and weeks between two dates.
Use now → 06 BMI Health & everyday BMI calculator Estimate body mass index from height and weight.
Use now → 07 PMT Finance & business Loan payment Estimate monthly payments and total interest.
Use now → 08 A Finance & business Compound interest Project growth with compounding over time.
Use now → 09 x̄ Research & statistics Mean, median & mode Summarize a numerical dataset quickly.
Use now → 10 σ Research & statistics Standard deviation Calculate sample and population deviation.
Use now → 11 n Research & statistics Sample size Estimate survey sample size by confidence and margin.
Use now → 12 ½ Math & science Fraction calculator Add, subtract, multiply and simplify fractions.
Use now → 13 △ Math & science Geometry calculator Area, perimeter and volume for common shapes.
Use now → 14 x Math & science Algebra solver Solve and explain common algebraic equations.
Use now → 15 x² Math & science Quadratic equation Find roots, discriminant and vertex information.
Use now → 16 # Math & science Random number generator Generate numbers within a custom range.
Use now → 17 CI Research & statistics Confidence interval Estimate a population range from sample results.
Use now → 18 ± Research & statistics Margin of error Calculate survey precision from sample data.
Use now → 19 r Research & statistics Correlation coefficient Measure the strength of a linear relationship.
Use now → 20 t Research & statistics T-test calculator Compare means and calculate a t statistic.
Use now → 21 F Research & statistics ANOVA calculator Compare the means of multiple groups.
Use now → 22 ŷ Research & statistics Linear regression Fit a line and inspect its slope and intercept.
Use now → 23 dB Engineering & technical Free-space path loss Calculate radio propagation loss from frequency and distance.
Use now → 24 /24 Engineering & technical IPv4 subnet Calculate addresses and usable hosts from a CIDR prefix.
Use now → 25 Mb Engineering & technical Download time Estimate transfer time from file size and link speed.
Use now → 26 Ω Engineering & technical Ohm’s law Calculate voltage, current or resistance.
Use now → 27 dBm Engineering & technical dBm and watts Convert RF power between dBm, mW and watts.
Use now → 28 λ Engineering & technical Antenna wavelength Calculate wavelength and common antenna lengths.
Use now → 29 RF Engineering & technical RF link budget Estimate received power across a wireless link.
Use now → 30 R Engineering & technical Resistor colour code Read resistance and tolerance from colour bands.
Use now → 31 N₀ Engineering & technical Thermal noise Calculate receiver thermal noise power.
Use now → 32 ROI Finance & business Return on investment Compare an investment’s gain with its cost.
Use now → 33 GM Finance & business Profit margin Calculate margin, markup and gross profit.
Use now → 34 ¤ Finance & business Currency converter Convert values using current exchange rates.
Use now → 35 Au Finance & business Gold value Estimate value by weight, purity and market rate.
Use now → 36 2.5 Finance & business Zakat calculator Organize eligible assets and estimate zakat.
Use now → 37 24h Health & everyday Time calculator Add durations and compare times.
Use now → 38 km/L Health & everyday Fuel consumption Compare distance, fuel use and journey cost.
Use now → 39 °C Health & everyday Cooking converter Convert volume, weight and temperature for recipes.
Use now →