Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Visible dimensions only. No allowance for overlap onto the artwork, frame rebate or bottom weighting.
Example Calculation
- Frame opening width: 400 mm
- Frame opening height: 500 mm
- Artwork width: 300 mm
- Artwork height: 400 mm
A 300×400 mm artwork centered in 400×500 mm leaves 50 mm borders.
Frequently asked questions
How do I use this calculator?
Enter frame opening width, frame opening height, artwork width, artwork height. The result updates automatically. Use Reset to restore the example values.
What method does it use?
side border=(frame width−art width)/2; top/bottom=(frame height−art height)/2.. Visible dimensions only. No allowance for overlap onto the artwork, frame rebate or bottom weighting.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.