# Toolstud.io calculation examples

This website contains a bunch of web-based tools that I have developed through the years. These are some examples of how to use them. This page gives you 10 examples at random. Refresh the page to see other examples!

### How could you use these tools?

If I'm showing an HD video on a scope screen, how much of the screen am I using?
Click on photo >> aspect
Fill in `1920 x 1080`, look at "scope screen" letterboxing: `74.4%` is used.
My mobile 4G data allowance is 5GB/month. How much is that per day or per hour?
Click on data >> bandwidth
Fill in `5GB/mo`. This is equivalent with 167MB/day or 7MB/hr
How big is a 15-minute 1080p25 movie in ProRes 4444?
Click on video >> bitrates
Look up 1080p25: `275 Mbps`. Click on the `2.06 GB/min` and fill in `15 minutes`. This adds up to `30.9 GB`!
At home I have Internet at approx. 120Mbps. How long to take to download a 2GB Wetransfer file?
Click on data >> bandwidth
Fill in `120 Mbps`. This is equivalent to 900MB/min. So 2GB would go through in 2.2 minutes.
What is the RGB color #F60 in CMYK?
Click on color >> rgb
Fill in `F60`. In CMYK this would be (0, 0.6, 1, 0)
Click on calculate >> exponential
Carbon-14 has a half-life of 5730 years
I have a 30-second TV commercial at 25fps, what happens if I convert it to 24fps (cinema)?
Click on video >> framerate
Fill in `25 (input) fps`, `30 sec` and `24 (output) fps`. Results: your cinema spot will be `31.25 sec`.
If I practice my violin for 3 hours every day, how long until I reach (Gladwell's) 10.000 hours level of excellence?
Click on calculate >> practice
Fill in `3 hours`, `7 days/week` and `52 weeks`. You will find it would take you 9.2 years.
If I borrow \$20.000 to buy a car, and I pay that off in 4 years, how much do I pay per month?
Click on finance >> mortgage
Fill in `20000 \$`, `4 years` and the current interest rate, e.g. `1.9%`. This gives a monthly payment of \$433 (FRM).
This motor cycle does 185 km/h. What is that in miles/hr, and in meter/sec?
Click on calculate >> speed
Fill in `180 km/hr`. This translates to 115 miles/hr, and 51.39 meter/sec.