Calculator with Editable Tape and Scientific Functions

Browser 129

Calculator no file limit

Inspector calculate/calculator

Calculator

Calculate Tools · Runs in your browser

An exact calculator with an editable tape, linked answers and scientific functions. All calculations stay in your browser.

text
0 B out

Calculator

Overview

Use the keys or your keyboard to calculate. Each answer goes on a tape: choose an expression to edit it, or an answer to reuse it. Linked answers update when an earlier line changes. Your tape is saved only in this browser.

Key features

Exact decimal and fraction arithmetic
Editable tape with linked answers
Percentage calculations with working
Scientific functions in degrees or radians
Keyboard and touch input
Tape saved on your device
Light and dark themes

Set

Calculate Tools 04

Neighbours

01 BMI Calculator 02 Percentage Calculator 03 VAT Calculator 04 Audio Transcriber 05 Run AI in the browser 06 Invoice Builder

Specification

Command: calculate.calculator
Set: Calculate
Input: text
Output: —
Max file: no limit
Batch: single file

Runtime

Engine: native
Threads: single
Isolated: —
WebGPU: —
Memory: —

Transport 0 B

Your file is opened, worked on and saved inside this tab. This tool has no upload step, so your file has nowhere else to go.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

How it works

Enter a calculation

Use the round keys or type an expression. The quiet preview follows mathematical precedence; press Equals to put it on the tape.

A calculator showing 230, with a tape containing a linked answer and the working for a fifteen percent increase

Reuse and edit

Choose a tape answer to insert a linked reference. Choose its expression to edit it; saving recalculates later linked lines. On a phone, open the tape from the line count or swipe up on the display.

The third tape line being edited, marked by a blue rule and an editing label

Open scientific keys

Use fx for trigonometry, logarithms, roots, powers and factorials. DEG switches to RAD. Use 123 to return to digits.

The scientific keypad with trigonometry, logarithms, roots, powers and factorials

Frequently asked

How exact are the answers?

Decimal and fraction arithmetic is stored as exact fractions. The display shows up to twelve significant digits, with ≈ when rounded. Scientific functions use fifty-digit decimal precision and are marked approximate. Reusing an answer uses its internal value, not the rounded display.

How do percentages work?

200 + 15% gives 230 and shows that 15% of 200 is 30. Subtraction works the same way. Multiplication, division and a standalone percentage use hundredths, so 200 × 15% gives 30.

Is the tape uploaded?

No. Calculations run locally and the tape is saved in this browser's local storage. Clear removes the saved tape. Undo clear is available in the current session until another calculation is saved.

What happens when I edit an earlier line?

References such as ans₁ remain linked to the earlier line. Saving an edit updates dependent answers; Cancel keeps the original. A line can reference only an earlier line, and each line keeps its own angle mode.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

Show this on tools I haven't used