Bandwidth converter
Mbps ⇆ KB/s, GB/day, ...

Data size calculator
Calculate 10 Mbps x 6.5 hours = ? GB

Electrical power calculator
Calculate Volt x Ampere = Watt, kWh, Ah, Joule

RGB color converter
RGB color ⇆ CMYK, HSV, XYZ, Grayscale...

HTML Color list
List of named HTML colors

Pantone Color list
List of named Pantone colors

Websafe Color list
List of websafe colors

Aspect ratio calculator
Image W x H → aspect ratio

Megapixel calculator
Image W x H → megapixels

Megapixel Aspect Comparison
See megapixel in different aspect ratios

DPI calculator
Print W x H and dpi → megapixels

Composition calculator
Focal length, subject distance, crop factor → image composition

Depth-of-Field calculator
Aperture, focal length, subject distance, crop factor → depth-of-field

Light calculator (EV)
Aperture, shutter time, ISO => Exposure Value

Frame rate converter
Framerate conversion with ffmpeg and sox

Video bitrate calculator
Estimate video bitrate based on resolution, fps and bit depth

Video size calculator
Estimate video size from resolution and duration

Beats-per-minute
Convert BPM to beat, measure and song length

HTML encoder
Encode text full of àççéñts

HTML char map
View all special HTML/Unicode characters

Mortgage loan calculator
Calculate monthly payments for a mortgage loan

Fuel Cost calculator
How much $ does your car fuel cost per year?

Speed converter
Convert m/s into km/h, mph, mach

Distance calculator
Speed x time → distance

History & development
What? Who? Why? How?

Contact
Remarks about this site? Let me know!

Terms & Conditions
Terms & conditions, privacy statement

Donations/wishlist
How to show your appreciation

Development blog
Progress on the technical side