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.
- A stated minimum-dimension policy, not a universal supplier rule. Check whether the maker already applies deductions and which height rule the blind type requires.
Example Calculation
- Three opening widths: 1000,998,999
- Three opening heights: 1500,1498,1502
- Width deduction: 5 mm
- Height deduction: 5 mm
Widths 1000,998,999 mm and a 5 mm deduction give order width 993 mm; listed heights give 1493 mm.
Frequently asked questions
How do I use this calculator?
Enter three opening widths, three opening heights, width deduction, height deduction. The result updates automatically. Use Reset to restore the example values.
What method does it use?
order width=min(measured widths)−deduction; order height=min(heights)−deduction.. A stated minimum-dimension policy, not a universal supplier rule. Check whether the maker already applies deductions and which height rule the blind type requires.
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.