QuickCalc – Free All-in-One Calculator: Stats, Salary

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QuickCalc — The Fast All-in-One Calculator

Five instant calculators in one clean page: quick math, percentages, statistics, salary conversions and tip splitting. No ads shouting, no signup, works offline. Click a tab and get your answer as you type.

✓ 5 Calculators · ✓ Zero Lag · ✓ 100% Private & Offline

🔧 JS ⏳ · Input — · Result — · Engine ⏳

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Supports parentheses, % and full expressions — e.g. (250-30)×12%

1️⃣ What is X% of Y?

% of = —

2️⃣ X is what % of Y?

of = —

3️⃣ % change from old to new

→ = —

💡 % change: (new − old) ÷ old × 100. Perfect for discounts, markups, price moves and grades.

Paste your numbers — separated by spaces, commas or new lines

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Count

—

Sum

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Mean

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Median

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Std Dev

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Min / Max

📊 Mean, median, sample standard deviation and range — the everyday stats GraphPad-style tools are used for, without the lab-software clutter.

Enter any one value — the rest compute instantly. Assumes a 40-hr week, 52 weeks/year. Currency-agnostic: read results as $, £, € or ₹.

Annual

Monthly

Weekly

Hourly

Bill ($)

Tip % 10%15% 18%20%25%

Split between

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Tip

—

Total

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Each pays

Why Use This QuickCalc?

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Five Tools, Zero Waiting

Math, %, stats, salary and tips — every answer appears as you type, no calculate buttons.

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Works Offline

Pure browser math with no server calls — it keeps working when your signal doesn't.

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Real Statistics

Mean, median, sample standard deviation and range from any pasted number list.

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Salary Any Direction

Type annual, monthly, weekly or hourly — the other three appear instantly.

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100% Private

Nothing you enter is sent, stored, or logged — refresh and it's all gone.

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Free Forever

No accounts, no limits, no paywalls. Bookmark it — it's your calculator now.

Popular Use Cases

• 🛍️ Sale math in seconds — 30% off, then the % change from old to new price
• 📊 Quick stats on homework or survey data — paste, done
• 💼 Compare a $52,000 salary vs a $27/hr offer before negotiating
• 🍔 Split the dinner bill fairly with tip in two taps
• 🧾 Chain quick math with parentheses — (250-30)×12% in one expression
• ✈️ Offline calculating anywhere — flights, dead zones, airplane mode

Pro Tips

• Percent keys in Quick Math: the % button divides by 100 — so 250×12% is 30. Chain it: (250-30)×12% for discount-then-tax style math.
• % change sign matters: a negative result means a decrease — 80 → 60 is −25%, not "25% off twice".
• Stats input is forgiving: paste straight from spreadsheets — commas, spaces, tabs and new lines all parse.
• Salary uses 2,080 hours: that's the standard 40×52. For part-time, enter your hourly rate and read annual — or compute manually with your real weeks.
• Standard deviation here is sample SD (n−1 denominator) — the right default for real-world data samples.

Frequently Asked Questions

A fast, free all-in-one calculator that lives entirely in your browser: quick math with full expressions, three percentage modes, statistics from pasted data, salary conversions and tip splitting. No install, no account, no internet required after the page loads.

No — GraphPad's QuickCalcs is a suite of statistical tests for scientific research. This page is an independent general-purpose calculator. If you need everyday statistics (mean, median, standard deviation), the Statistics tab here covers that instantly; for formal hypothesis tests, GraphPad remains the specialist tool.

No. ADP QuickCalc is ADP's payroll calculation tool, and QuickCalc in AutoCAD is the built-in calculator inside AutoCAD's command line (open it there with QC or CALC). This page is an independent web calculator — though the Salary tab handles quick payroll-style conversions, and you can bookmark it for math anywhere.

Three moves cover everything: X% of Y = X ÷ 100 × Y (15% of 80 = 12). X as a % of Y = X ÷ Y × 100 (12 of 80 = 15%). % change = (new − old) ÷ old × 100 (80 → 100 = +25%). The Percentage tab runs all three live as you type.

No. Every calculation is JavaScript running on your own device — numbers are never transmitted, saved, or logged. There is no account and nothing persists after you close the tab.

Yes — the layout is fully responsive and touch-friendly. Big calculator buttons, tab-friendly number inputs, and all five tools work identically on Android and iPhone browsers.

It's completely free with no limits — no premium tier unlocking basic features, no watermarks on anything, because there's nothing to watermark. It's a calculator.

Sample standard deviation (the n−1 formula), which is the correct default when your data is a sample of a larger population — the usual real-world case. It needs at least two numbers; with one value the field shows a dash.