Welcome to Calcuzza
Free online calculators for work, finance, and health. No signup. No ads. Works in your browser.
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Timecard Calculator
Calculate work hours, overtime pay & weekly paycheck. Smart fill, shift templates, CSV export & freelance invoices
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Scientific Calculator
Free online scientific calculator with trig, log, powers, constants and full keyboard support
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Salary Calculator
Convert hourly wage to annual salary. Calculate weekly, monthly & yearly earnings with tax deductions
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EMI Calculator
Calculate EMI for home loan, car loan or personal loan. Full amortization schedule with interest breakdown
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BMI Calculator
Calculate Body Mass Index in metric (kg/cm) or imperial (lbs/ft). Check healthy weight range instantly
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More Calculators
ROI, profit margin, compound interest, SIP, percentage, date & time, break-even, BMR & TDEE calculators
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About & Contact
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📅 Time Entry
💰 Salary
🔮 What If
💼 Freelancer
Free Timecard & Overtime Calculator Enter check-in and check-out times — work hours, overtime pay, and paycheck calculated instantly.
Daily time entries
Calculate Hours & Pay
Summary
Detailed breakdown Export CSV
Day Date In Out Reg hrs OT hrs Total hrs Pay Type
Clear
Copy summary
Save locally
Print / PDF
Hourly to Salary Paycheck Converter Enter your hourly rate and hours to predict weekly, monthly and yearly earnings — with tax estimates.
Calculate Salary
What If Calculator Compare your current schedule against a new one — see the pay difference instantly.
Compare Scenarios
Freelance Invoice & Billable Hours Calculator Track hours per project and generate a professional client invoice instantly — free.
Projects / line items
+ Add project
Generate Invoice
Copy invoice text
Print / PDF
Free Online Scientific Calculator Full scientific calculator with trigonometry, logarithms, powers and keyboard support — works in any browser.
sin
cos
tan
log
ln
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xʸ
π
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Hourly to Annual Salary Calculator Convert any hourly, daily, weekly, monthly or annual income instantly — with net pay after tax.
Convert Salary
Breakdown
How salary conversion works
Enter any amount and select the time period — Calcuzza converts it to all other periods automatically using your hours-per-week setting.
Formulas used
Annual = Hourly × Hours/week × 52 Monthly = Annual ÷ 12 Weekly = Hourly × Hours/week Daily = Hourly × Hours/day
Free EMI Loan Calculator Calculate your monthly loan installment, total interest paid, and full amortization schedule — for home, car, or personal loans.
Calculate EMI
Amortization — first 12 months
Month EMI Principal Interest Balance
What is an EMI Calculator?
EMI = Equated Monthly Installment. It's the fixed amount you pay every month to repay a loan over a set period.
EMI Formula
EMI = P × r × (1+r)ⁿ / ((1+r)ⁿ − 1)
Where P = principal, r = monthly interest rate, n = number of months.
Tips to reduce your EMI
Make a larger down payment to reduce the principal Choose a longer tenure (though you'll pay more interest) Negotiate a lower interest rate with your lender
Free BMI Calculator Calculate your Body Mass Index (BMI) with metric or imperial units and check your healthy weight range.
Calculate BMI
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Underweight Normal Overweight Obese
What is BMI?
Body Mass Index (BMI) is a measure calculated from your height and weight. Formula: BMI = weight(kg) ÷ height(m)²
BMI limitations
Doesn't distinguish between muscle and fat Athletes may have high BMI but low body fat Always consult a doctor for health decisions
More Calculators
Business analysis, finance, everyday utilities, and health tools — all free.
📈 ROI
💹 Profit
⚖️ Break-Even
🏦 Compound
📊 SIP
% Percentage
📅 Date & Time
🔥 BMR / TDEE
ROI Calculator Calculate Return on Investment and see how profitable your investment really is.
Calculate ROI
What is ROI? Return on Investment (ROI) measures the gain or loss relative to the cost of an investment. Formula: ROI = (Net Profit ÷ Cost) × 100
Profit Margin Calculator Calculate gross, operating, and net profit margins instantly.
Calculate Margins
Profit Margin Types
Gross Margin = (Revenue − COGS) ÷ Revenue × 100Operating Margin = Operating Profit ÷ Revenue × 100Net Margin = Net Profit ÷ Revenue × 100
Break-Even Calculator Find out how many units you need to sell to cover your costs.
Calculate Break-Even
Break-Even Formula Break-Even Units = Fixed Costs ÷ (Selling Price − Variable Cost per Unit). The denominator is also called the Contribution Margin per unit.
Compound Interest Calculator See how your money grows with the power of compounding over time.
Calculate Growth
Compound Interest Formula A = P(1 + r/n)^(nt) — where P = principal, r = annual rate, n = compounding frequency, t = time in years.
SIP Calculator Calculate the future value of your Systematic Investment Plan (SIP) / recurring investment.
Calculate SIP Returns
What is a SIP? A Systematic Investment Plan lets you invest a fixed amount regularly (monthly) into mutual funds or stocks. Returns compound over time using: FV = P × ((1+r)^n − 1) / r × (1+r)
Percentage Calculator Three quick percentage tools — find any percentage, change, or difference.
What is X% of Y?
Calculate
Percentage change (increase / decrease)
Calculate
X is what % of Y?
Calculate
Date & Time Calculator Find days between two dates, add or subtract days from a date, and more.
Days between two dates
Calculate difference
Add / subtract days from a date
Calculate date
Age calculator
Calculate age
BMR / TDEE Calculator Calculate your Basal Metabolic Rate and Total Daily Energy Expenditure.
Your details
Unit system
Metric Imperial
Gender
Male Female
Age (years)
Activity level
Sedentary (little/no exercise)
Lightly active (1–3 days/wk)
Moderately active (3–5 days/wk)
Very active (6–7 days/wk)
Extra active (hard exercise + physical job)
Calculate BMR & TDEE
What is BMR?
Basal Metabolic Rate (BMR) is the number of calories your body needs at rest. TDEE multiplies BMR by your activity level to give total daily calorie needs.
Formula used (Mifflin-St Jeor)
Male: (10 × kg) + (6.25 × cm) − (5 × age) + 5
Customize Calcuzza
Change the accent color, font size, and corner radius to make it yours. Settings are saved automatically.
Accent color
Pick a color — it updates buttons, highlights, and accents across the whole site.
Font size
Small
Medium
Large
Extra Large
Font style
Syne
Modern — Default
Inter
Clean & readable
Poppins
Friendly & rounded
Roboto
Classic & neutral
Playfair
Elegant & editorial
Space Mono
Technical & mono
Changes the font across the whole site. Saved automatically.
Corner style
Sharp
Subtle
Rounded
Pill
Currency symbol
$ Dollar
£ Pound
€ Euro
₹ Rupee
¥ Yen
₩ Won
₪ Shekel
د.إ AED
Updates currency symbols across all financial calculators.
Live preview
Timecard Calculator
This is how your accent color and corners look across cards and buttons.
Calculate Hours & Pay
Reset to defaults
About Calcuzza
A free, fast, all-in-one calculator suite — built by one person for everyone.
Calcuzza — info calculator
calcuzza.netlify.app
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Support Calcuzza
Calcuzza is 100% free and always will be. If it saved you time, a coffee goes a long way toward keeping it running.
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