Use common sense when you consider the result. Does it seem correct? Or are the numbers wrong, and you can't figure out why?
Remember - the math monster inside your computer accessed by this site can only work with the numbers you feed it. Garbage in - garbage out.
When calculating the amount of stuff to fill into moulds, take into account material stuck to the sides of your mixing vessel. Thus, add extra to make sure you have enough material to fill the mould.
I don't take any responsibility if the result you get from calculations on this site is wrong. I have checked and triple checked and found the calculations I threw at it are correct. But - I'm not a mathematician, and I might have got some formulas slightly wrong. I don't think I have, but there is always that possibility.
If you wonder if anything changed since your last visit, you can look at the change log.
Added info on the recommended percentages maximum of softeners/deadeners
Did some small changes to the title of dropdown menus for smartphones
Added a contact form accessed thru the lightbulb top right of page
01. March 2022
Made the FX Calc into a PWA (progressive web app). This means you can install this website onto your mobile device as an app! It means fast speed, offline and always accessible calculators.
To use it - selectthe Share buttonand choose Add to Home Screen. Now you have an offline app.
Added Calculate-buttons everywhere. Not really necessary, as the calculation happens when you click outside the entry-field or type return, but I realized some people actually had a hard time figuring it out.
Had a serious spring cleaning of spelling and grammar. Weeded out way too many errors. I'm embarrassed.
Changed the font in all my headers and buttons. A bit more square, but still monstrous.
Changed the title to "The Monster's FX Calc". Because, why not.
Changed the last tab from Test-tube flat bottom to Capsule
Under the hood
And some under the hood fixes
How to measure
I would recommend measuring everything in cm. This way you get results in ml (cm3).
However, if you want results in litres (dm3), measure in dm (as in 10 cm).
The calculations are independent of metric vs imperial, so if you have to use inches or feet, please do so. The volume should then be in inch3 or feet3 or whatever measurement you enter.
The formulas do not do fractions, so you have to calculate them into a decimal value.
Note Use the same system for all measurements in the formula.
Diameter vs radius
All the math containing a circle is based on the idea of r, or radius. This is the distance from the centre of the circle to the edge.
This might be difficult to measure, so I recommend measuring the Diameter. This is from edge to edge crossing the centre point of the circle.
All the input fields when dealing with circles are based on the input of the Diameter value.
All the heights are measured perpendicular to the top and base, never at an angle.
Think of it as if you are on top of the item you want to measure. Drill a hole at your feet and drop the end of the measuring tape into this hole. Let it drop until it hits the bottom. This is your height.
And just for fun - if you need something to listen to when your work, here is the best podcast in our industry.
This site uses an absolute minimum of cookies. No calculations are saved, and nothing is stored. Unfortunately, this means you have to start from scratch for each reload. But, that's the price for privacy and confidentiality. I do have a counter to get some statistics of what pages are most visited. I’m the only one with access to this info.