This website contains a bunch of web-based tools (you don't need to install anything, just run them here) that I have developed through the years.
Use them like you want (within reason) and if you really like them, let me know.
Bandwidth converterMbps ⇆ KB/s, GB/day, ...
Data size calculatorCalculate 10 Mbps x 6.5 hours = ? GB
Electrical power calculatorCalculate Volt x Ampere = Watt, kWh, Ah, Joule
HTTPS readiness checkIs your site ready for Google's HTTPS everywhere policy?
RGB color conversionRGB color ⇆ CMYK, HSV, XYZ, Grayscale...
CMYK color conversionCMYK color ⇆ RGB, HSV, XYZ, Grayscale...
HTML Color listList of named HTML colors
Pantone Color listList of named Pantone colors
Websafe Color listList of websafe colors
Aspect ratio calculatorImage W x H → aspect ratio
Megapixel calculatorImage W x H → megapixels
Megapixel Aspect ComparisonSee megapixel in different aspect ratios
DPI calculatorPrint W x H and dpi → megapixels
Composition calculatorFocal length, subject distance, crop factor → image composition
Depth-of-Field calculatorAperture, focal length, subject distance, crop factor → depth-of-field
Light calculator (EV)Aperture, shutter time, ISO => Exposure Value
Frame rate converterFramerate conversion with ffmpeg and sox
Video bitrate calculatorEstimate video bitrate based on resolution, fps and bit depth
Common video bitratesList of commong video bitrates
Video file size calculatorEstimate video file size from resolution and duration
Audio file size calculatorEstimate audio file size for uncompressed and compressed audio
DCP file size calculatorCalculate DCP audio and video filesizes
Beats-per-minuteConvert BPM to beat, measure and song length
Tap your tempoTap to find the BPM
HTML encoderEncode text full of àççéñts
HTML char mapView all special HTML/Unicode characters
Mortgage loan calculatorCalculate monthly payments for a mortgage loan
Fuel Cost calculatorHow much $ does your car fuel cost per year?
Speed converterConvert m/s into km/h, mph, mach
Distance calculatorSpeed x time → distance
Gladwell's 10000 hour-ruleDeliberate practice according to Malcolm Gladwell
Examples of how to use the toolsShow me how I can use these tools
History & developmentWhat? Who? Why? How?
ContactRemarks about this site? Let me know!
Terms & ConditionsTerms & conditions, privacy statement
Donations/wishlistHow to show your appreciation
Development blogProgress on the technical side