Celsius to Fahrenheit
°F = (°C × 9/5) + 32
Example: 20 °C = (20 × 1.8) + 32 = 68 °F
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Unit Converter
Quick conversions for length, weight, and temperature.
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Color Converter
Go from HEX to RGB and HSL with a handy color preview.
Converters
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Unit ConverterConvert measurements between the units used by different products, documents, or countries. Pick the measurement type first, then the source and target units. Length and weight conversions use multiplication factors; temperature conversions also involve an offset. The displayed result is rounded to keep it readable.Color ConverterTranslate a HEX color from a design file into RGB or HSL notation for your CSS. Enter the digits with or without a leading #. The formats describe the same opaque sRGB color; changing the notation does not improve contrast or alter the color. HSL values are rounded to whole numbers in this tool.
How unit conversion works
Temperature needs a formula
Length and weight conversions use multiplication factors. Temperature also needs an offset because Celsius, Fahrenheit, and Kelvin place zero at different points.
Fahrenheit to Celsius
°C = (°F − 32) × 5/9
Example: 98.6 °F = (98.6 − 32) × 5/9 = 37 °C
Celsius to Kelvin
K = °C + 273.15
Example: 20 °C = 293.15 K
Kelvin to Celsius
°C = K − 273.15
Example: 300 K = 26.85 °C
Two useful checkpoints are that −40 is the one temperature where Celsius and Fahrenheit have the same numerical value, and absolute zero is −273.15 °C or −459.67 °F. The converter rejects temperatures below absolute zero.
Conversion factors supported by this tool
Metric length and weight units use powers of ten. The following definitions are the exact factors used for the imperial and US customary units available in ToolRino.
Length
- 1 inch = 2.54 centimeters
- 1 foot = 0.3048 meters
- 1 yard = 0.9144 meters
- 1 mile = 1.609344 kilometers
Weight
- 1 pound = 0.45359237 kilograms
- 1 ounce = 28.349523125 grams
- 1 kilogram = 1,000 grams
- 1 gram = 1,000 milligrams
Why some results are rounded
ToolRino displays up to 12 significant digits. Exact terminating results that fit within that limit remain visible—for example, 5 miles is 8.04672 kilometers. Results with more digits are rounded for readability. For engineering, scientific, or legal work with a specified precision, keep the required precision through your calculation and round only the final result.
Open the Unit Converter →How color formats relate
The same color, written three ways
HEX, RGB, and HSL can describe the same opaque sRGB color. Changing notation does not change its appearance, improve contrast, or increase vibrancy. ToolRino accepts a three- or six-digit HEX value and produces its RGB and rounded HSL equivalents.
How HEX works
A six-digit HEX color contains three pairs of hexadecimal digits: #RRGGBB. Each pair represents a value from 00 to FF in base 16, equivalent to 0 through 255 in decimal, in red, green, then blue order.
#FF6B35 splits into FF, 6B, and 35. Those values are 255 red, 107 green, and 53 blue, producing rgb(255, 107, 53). Three-digit shorthand doubles each digit, so #ABC expands to #AABBCC.
How HSL works
HSL expresses a color as hue, saturation, and lightness. Hue is a position on the color wheel from 0 to 359 degrees: red begins at 0, green at 120, and blue at 240. Saturation describes color intensity from 0% to 100%; zero produces gray. Lightness ranges from black at 0% to white at 100%, with the strongest form of a hue typically around 50%.
HSL is convenient when building a palette because you can adjust lightness or saturation independently. This converter rounds HSL components to whole numbers, so the displayed HSL value can convert back to slightly different RGB channel values. Keep the six-digit HEX or RGB result when exact channel values matter.
Open the Color Converter →Common converter questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5, then add 32. For example, 20 °C becomes (20 × 1.8) + 32, which is 68 °F.
Is an inch exactly 2.54 centimeters?
Yes. The international inch is defined as exactly 2.54 centimeters. The international avoirdupois pound is also defined as exactly 0.45359237 kilograms.
At what temperature are Celsius and Fahrenheit the same?
They have the same numerical value at −40 degrees: −40 °C equals −40 °F.
What is the difference between HEX and RGB?
For the opaque sRGB colors supported here, they are two ways to write the same channel values. HEX uses base-16 pairs and RGB uses decimal values from 0 to 255. #FF6B35 and rgb(255, 107, 53) describe the same color.
Why does a three-digit color such as #ABC work?
It is shorthand. Each digit is doubled to create the six-digit value, so #ABC expands to #AABBCC.
When should I use HSL instead of HEX?
HSL can be easier to adjust by hand because hue, saturation, and lightness are separate values. This converter rounds HSL values to whole numbers, so use six-digit HEX or RGB when exact channel values matter.
Are my values sent to a server?
No. Both converters run in your browser using JavaScript. ToolRino does not transmit, log, or store the values you enter in these converters.
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