You can use Calcumber just by typing math naturally:
2×18.3 + 2×(30 + 6) ➔ 108.6
Basic math symbols in Calcumber are:
×, *, ∙,· for multiplication
*, ∙,· for division
Example with variables and comments:
My year of birth: born = 1988;
Year of today: today = 2025;
My age now: today - born ➔ 37
The semicolon ; at the and prevents the result from being printed.
The previous result can be reused with ans:
In two years I will be: ans + 2 ➔ 39
You can reuse previous inputs by using the up and down arrow keys or ▲ ▼ on the Calcumber KeyPad.
Do calculations with units naturally:
v = 50 mi/h; — use space between number and unit
t = 37 min + 20 s; — use space unit and + operator
s = v*t ➔ 50068 m — Calcumber atomatically computes resulting unit
use km ➔ 50.068 km — tell Calcumber to use km
s = v*t; use km➔ 50.068 km — the same on one line
You can type a formula and insert values later:
Area of a circle: A = r^2 * pi, r = 35 cm ➔ A = 3848 cm^2
You can share your whole calculation with friends by clicking the share button. The web link points to the Calcumber web app and includes your input:
Try the following link:
https://web.calcumber.app/#input_history=Area_of_a_circle%3A_A_~q_r~e2_~m_pi~c_r_~q_35_cm