Find the angle that adds with the given angle to make 180 degrees.
Last updated: June 2026 | By Patchworkr Team
Enter a real number.
Supplementary angles add up to exactly 180 degrees.
1. Enter the angle in degrees.
2. Read the live supplementary angle.
3. Check that both angles sum to 180 degrees.
For angle 65 degrees:
supplement = 180 - 65 = 115
Yes. The supplement is the other endpoint of the 180-degree sum.
Yes, any finite real angle between 0 and 180 degrees is accepted.
The calculator rejects it because the tool is defined on 0 to 180 degrees.
No. Complementary angles sum to 90 degrees.
Related Tools