Fast · private · browser-only
From quick conversions to clear curves.
Calculate expressions, convert common units, plot functions and solve percentage questions locally.
Browse toolsFocused utilities
Calculators, Converters & Graphing Tools
Percentage calculator
Solve common percentage questions with clear inputs and instant local results.
Open tool Browser-onlyScientific calculator
Evaluate powers, roots, logarithms, trigonometric functions and grouped expressions locally.
Open tool Browser-onlyReverse percentage
Recover an original value from a known result after a percentage increase or decrease.
Open tool Browser-onlyStandard calculator
Use a fast keyboard-friendly calculator for arithmetic, percentages, powers and common scientific functions.
Open tool Browser-onlyFunction plotter
Plot up to three mathematical functions with adjustable axes, zoom controls and accessible sample values.
Open tool Browser-onlyTemperature converter
Convert Celsius, Fahrenheit and Kelvin instantly in either direction.
Open tool Browser-onlyDistance converter
Convert kilometres, miles, metres, feet, inches, yards and nautical miles.
Open tool Browser-onlyWeight converter
Convert kilograms, pounds, ounces, stone, grams and milligrams.
Open tool Browser-onlyVolume converter
Convert litres, millilitres, US and imperial gallons, cups and fluid ounces.
Open tool Browser-onlyArea converter
Convert square metres, square feet, acres, hectares and square kilometres.
Open tool Browser-onlySpeed converter
Convert kilometres per hour, miles per hour, metres per second and knots.
Open tool Browser-onlyFuel economy converter
Convert L/100 km, US MPG, imperial MPG and kilometres per litre.
Open tool Browser-onlyPressure converter
Convert bar, PSI, pascals, kilopascals, atmospheres and millimetres of mercury.
Open tool Browser-onlyData storage converter
Convert bytes, bits, decimal KB/MB/GB/TB and binary KiB/MiB/GiB/TiB.
Open tool Browser-onlyTime converter
Convert milliseconds, seconds, minutes, hours, days, weeks and common year lengths.
Open toolClear answers
About calculators, converters & graphing tools
Are the calculators, converters & graphing tools free?
Yes. Every tool in this collection is free to use without an account.
Does MW SysArc receive what I enter?
No. Inputs and calculations remain inside your browser and are not transmitted to or stored by MW SysArc.
Can I use the results for important decisions?
Treat results as practical estimates. Verify consequential academic, employment, financial or access decisions against the applicable rules and source records.