Measurement Tools – Small Tools. Big Help.

Welcome to SmallToolsOnline.com — your go-to toolkit for working with measurements, units, and conversions quickly and accurately. Our collection of smart browser-based measurement tools helps you convert, calculate, and compare units instantly — all without installing any software or sending your data anywhere.

From simple length and weight converters and temperature calculators to advanced area, volume, and speed converters, every tool runs directly in your browser using fast JavaScript processing.

Whether you're a student learning measurements, an engineer working with data, or a researcher needing precise unit conversions — Small Tools Online helps you do it faster, smarter, and safer.

All Measurement Tools

Length Converter
Convert between units of length (m, ft, in, cm).
Area Converter
Convert area units (sq m, sq ft, acres).
Volume Converter
Convert units of volume (litres, gallons, cubic m).
Weight/Mass Converter
Convert between kg, lb, g, oz.
Speed Converter
Convert speed units (km/h, mph, m/s).
Temperature Converter
Convert between °C, °F, K.
Time Converter
Convert hours, minutes, seconds, days.
Power Converter
Convert power units (W, kW, hp).
1 GB
Data Storage Converter
Convert bytes, KB, MB, GB, TB.
mpg
Fuel Efficiency Converter
Convert mpg, L/100km, etc.
Pressure Converter
Convert Pa, bar, psi.
kWh
Energy Converter
Convert J, kJ, kcal, kWh.
Hz
Frequency Converter
Convert Hz, kHz, MHz, GHz.
Angle Converter
Convert degrees, radians, grads.
Mb/s
Data Rate Converter
Convert bits/s, kB/s, MB/s.
Force Converter
Convert N, kN, lbf.
Nm
Torque Converter
Convert Nm, lbf·ft.
lux
Illuminance Converter
Convert lux, foot-candle.
dB
Sound Level Converter
Convert dB, dBA, SPL.
GB/s
Data Storage Rate Converter
Convert bytes/s, MB/s, GB/s.
g/cm³
Density Converter
Convert between density units (kg/m³, g/cm³).
Flow Rate Converter
Convert flow units (L/min, m³/s, gpm).
Acceleration Converter
Convert acceleration (m/s², g, ft/s²).
Radiation Converter
Convert Sievert, Gray, and Roentgen units.
cd/m²
Luminance Converter
Convert candela per m², nit, foot-lambert.
Magnetic Field Converter
Convert Tesla, Gauss, and Oersted units.
Pa·s
Viscosity Converter
Convert centipoise, Pa·s, stokes.
Electric Current Converter
Convert Ampere, milliampere, kiloampere.
C
Electric Charge Converter
Convert Coulomb, mC, μC, Ah.
V
Electric Potential Converter
Convert Volts, millivolts, kilovolts.
Electric Resistance Converter
Convert Ohm, kΩ, MΩ.
Capacitance Converter
Convert Farad, microfarad, picofarad.
Inductance Converter
Convert Henry, mH, μH.
Hz
Digital Frequency Timer
Measure oscillation frequency in real time.
Stopwatch Tool
Measure elapsed time accurately.
Countdown Timer
Set countdowns and track remaining time.
Metronome Tool
Measure beats per minute visually and audibly.
Compass Tool
Show direction using device orientation.
Ruler Tool
Measure objects directly on your screen.
Screen Protractor
Measure angles on screen precisely.
Screen Caliper
Measure distances between two points on screen.
px
Screen Ruler (Pixel)
Measure pixel distances on your display.
DPI
Screen DPI Checker
Find the exact DPI/PPI of your device screen.
Color Meter
Measure and detect colors from any image or screen.
Brightness Meter
Analyze screen or image brightness levels.
Contrast Checker
Measure contrast ratio between two colors.
°
Screen Angle Finder
Measure the tilt or rotation of your device screen.
Distance Calculator (Map)
Measure distance between two points on a map.
24"
Screen Size Detector
Find your monitor’s size and resolution in inches.
Screen Refresh Rate Test
Measure display refresh rate (Hz) using JavaScript.