Everyday calculators for India
Salary, rent, EMI, SIP, GST, electricity, fuel, paint and more — free, no login, works on mobile.
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Common money, home, tax, bill, conversion, and measurement questions people start with.
Estimate monthly take-home salary in India from CTC or gross salary, while separating employee PF, employer PF, TDS, professional tax, benefits, and variable pay.
Useful for: Understand how CTC and gross salary become monthly in-hand pay, then use the spendable amount for rent, budget, and EMI decisions.
Estimate a practical monthly rent range in India from your take-home income, regular debt payments, essential expenses, and preferred savings.
Useful for: Understand how much monthly rent may fit within a household budget before choosing a property.
Estimate a loan EMI, total interest, and whether the payment fits your Indian household budget after existing EMI, rent, essentials, and target savings.
Useful for: Decide whether a proposed loan EMI is manageable, understand its total cost, and estimate a more conservative EMI and loan limit.
Plan an India-first monthly budget using take-home income, regular expenses, debt payments, family obligations, and a savings target.
Useful for: Understand whether monthly expenses and savings fit within take-home income, identify the largest pressure, and decide what to adjust.
Add GST to a taxable price or extract GST from an inclusive bill, with CGST/SGST or IGST split, quantity, discount, invoice rounding, and optional margin checks.
Useful for: Understand the pre-tax value, GST amount, customer invoice total, tax split, and whether a quoted price protects the entered product cost and target margin.
Estimate appliance running cost, monthly electricity use, a flat-rate bill, and savings from lower daily usage with editable ₹/unit or global currency inputs.
Useful for: Understand how much an appliance may add to the bill, estimate a monthly electricity amount, identify usage pressure, and decide what to check or reduce next.
Convert common length, area, volume, mass, temperature, speed, time, and data storage units, then reuse the result without mixing unit systems.
Useful for: Convert a common measurement, understand what the result means, avoid mixing incompatible unit systems, and continue to a relevant daily-use calculator.
Calculate room, plot, circle, triangle, trapezoid, parallelogram, or multiple-room area; convert common square units; and estimate cost by area.
Useful for: Measure a surface, understand the result in practical units, estimate an optional area-based cost, and choose the correct next material calculator.
Start from your situation
Pick the decision in front of you and jump straight to the tools that help.
I want to…
Grow money with SIP, RD, FD, or a lumpsum, and plan towards a goal.
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See the EMI, what you can afford, and whether prepaying helps.
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Find take-home pay, plan the month, and check notice-period dues.
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See what card interest costs and whether prepaying clears it faster.
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Add or remove GST and check the split before billing.
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Check rent you can afford and plan bills, water, and paint.
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Fuel for a trip, unit conversions, percentages, and dates.
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Each category points to a small, useful set of calculators instead of a long link wall.
See what reaches your account, plan spending, check what rent and EMIs fit, and grow savings.
Browse Money calculatorsGrow savings with SIP, RD, and lumpsum investing, and weigh loan EMIs before you commit.
Browse Finance / Tax calculatorsPlan household bills, water storage, painting, and room measurements with fewer guesses.
Browse Home calculatorsMeasure an area first, then estimate paint, tiles, and concrete for the job.
Browse Construction calculatorsEstimate fuel for a trip, convert unfamiliar units, and keep the cost inside your budget.
Browse Travel calculatorsWork out marks, dates, units, and take-home salary for study, forms, and job decisions.
Browse Student / Job calculatorsCheck age, duration, and date-based eligibility before completing a form or schedule.
Browse Time / Date calculatorsConvert common measurements before using them in travel, home, or construction calculations.
Browse Unit Converters calculatorsWhat to try next
A useful result often becomes the input for the next calculator. These sequences keep related decisions together.
Monthly planning works better when income, housing, debt, utilities, and travel are seen together.
Measure the space once, then use that result to estimate finishes and materials.
Estimate fuel first, convert distance or volume when needed, then check the trip against your budget.
Confirm age and dates, calculate a percentage, and convert units before submitting details.
Estimates, not guarantees
Rupeka calculators provide estimates from the values and assumptions shown. Check official notices, bills, product labels, contracts, or a qualified professional before making a final decision.