∑
Calcu
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Created by Delta 21
The calculator is floating in its own always-on-top window.
Bring it back
Calcu
_
□
✕
M
DEG
2nd
🎤
Sci
DEG
🎤
Copy
Mini
Interpret
✕
Editing layout — drag keys to reorder, tap a key to hide/show.
Columns
Reset
Done
True always-on-top needs Chrome or Edge.
Keyboard shortcuts
0
–
9
.
Digits and decimal point
+
-
*
/
^
Operators (
x
also multiplies)
(
)
%
!
Parentheses, percent, factorial
Enter
/
=
Calculate
Backspace
Delete last entry
Delete
Clear entry (C)
Esc
Close panel, or all clear (AC)
Ctrl
+
C
Copy result
s
c
t
l
n
r
q
sin, cos, tan, log, ln, √, x²
p
e
π and e
H
M
V
History, mini mode, voice input
Space
Activate the focused key
?
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Tips & features
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What Calcu can do
Standard and scientific maths
— parentheses, percent, memory keys, and a Sci panel with trig, logs, powers, roots, π, e and factorial.
Live preview
— the answer appears as you type, before you press =.
14 skins
— from Retro LCD to Wooden Desk, each with its own sounds and a hidden easter egg.
History tape
— every calculation is saved with a timestamp; search, pin, add notes, reuse, copy, export (CSV, JSON, TXT) and import.
Voice input
— tap 🎤 and say things like “15 percent of 2,400” or “split 3,450 among 6 people”.
Mini mode
— a compact calculator that floats above other windows in Chrome and Edge.
Custom layout
— drag, resize, reorder or hide keys, change the column count, and save up to 3 presets.
Number formatting
— choose decimal and thousands separators, South Asian grouping, precision and scientific notation.
Themes
— light, dark or automatic (by system or time of day), plus your own accent color.
Fonts and sizes
— eight fonts including a dyslexia-friendly option, with adjustable display and button text.
Full keyboard control
— press
?
for the shortcut list.
Works offline
— your settings and history stay in this browser.
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