Guides
Plain explanations of the rules behind everyday calculations in Bangladesh, each with a worked example and a calculator to try.
Health
More Health calculatorsEducation
More Education calculatorsHow SSC and HSC GPA Is Calculated, With the 4th Subject
How the boards turn your letter grades into a GPA on the 5.00 scale: the 4th subject bonus, the 5.00 cap and the F rule, with a worked example.
How CGPA Is Calculated: Credit-Weighted Average Explained
How universities combine semester GPAs into a CGPA: the credit-weighted formula, the UGC 4.00 scale, rounding versus truncation, with a worked example.
HSC Board Challenge: Will a Higher Grade Change Your GPA?
Before you pay for a board challenge (re-scrutiny), see exactly how much one higher grade would add to your GPA, when it can turn a fail into a pass, and when it changes nothing.
Finance
More Finance calculatorsHow EMI Is Calculated: Formula, Interest and Principal
The reducing-balance EMI formula step by step, how each instalment splits into interest and principal, and why a flat rate costs more, with a full worked example.
How Sanchayapatra Profit Is Calculated: Rates, Payouts and Tax
The 2026 profit rates for Paribar, Pensioner, 3-month and 5-year Bangladesh Sanchayapatra, how monthly, quarterly and maturity profit are worked out, and how source tax is deducted.
FDR vs DPS: How the Returns Are Calculated and Compared
How FDR and DPS interest is worked out, why the two cannot be compared on rate alone, what source tax and excise duty take off, and how both differ from Sanchayapatra.
bKash and Nagad Cash Out Charge 2026: How Much per ৳1,000
The official cash-out charges of bKash, Nagad, Rocket and Upay, how the charge on any amount is worked out, how Priyo Agent works, and the official ways to pay less.
How to Calculate VAT in Bangladesh: Add and Remove 15%
The formulas for adding VAT to a price and taking it out of a VAT-inclusive price, why 15% of the total is the wrong answer, and quick shortcuts, with worked examples.
Zakat Nisab and Calculation: Gold, Silver and 2.5%
Who zakat is due from, the nisab of 7.5 bhori of gold or 52.5 bhori of silver, which wealth counts, and how to work out 2.5%, with a worked example and dated sources.
How to Calculate a Discount: Sale Price, Savings and Stacked Offers
The formulas for the price after a discount and the amount you save, why 20% plus an extra 10% is only 28% off, and how to find the original price, with worked examples.
Profit and Loss Calculation: Profit Percentage, Markup and Margin
How to work out profit or loss and the percentage on cost, why markup and margin give different numbers for the same sale, and how a discount eats into profit, with worked examples.
How to Write a Cheque Amount in Words: Lakh, Crore, Paisa and “Only”
Write any Taka amount in words on a cheque, in English and Bangla: crore, lakh and thousand groups, paisa, ending with “Only”, and the mistakes that get cheques returned.
Work & Wages
More Work & Wages calculatorsGovernment Job Age Limit: How Your Age Is Counted on the Circular Date
How BCS and other government job circulars count your age: on the circular’s own date, in completed years, against the 21–32 or 32-year limit.
Gross vs Net Salary: How Take-Home Pay Is Worked Out
What gross and net salary mean, the usual deductions such as provident fund, income tax (TDS) and loan instalments, and how to go from gross to take-home pay, monthly and yearly.
Labour Act 2026 Amendment: What Changed for Pay and Leave
What the Bangladesh Labour (Amendment) Act 2026 changed for workers’ money and leave: resignation compensation from the first year, 13 days’ festival leave, 120 days’ maternity leave and more, quoted from the official text.
How Gratuity Is Calculated in Bangladesh (Labour Act)
The Labour Act’s gratuity formula: which years count, when it is 30 or 45 days’ wages a year, which wage is used, and when you get gratuity instead of compensation, with worked examples.
Everyday
More Everyday calculatorsLand Measurement in Bangladesh: Decimal, Katha, Bigha and Acre
How Bangladesh’s land units relate to each other, from decimal and katha to bigha and acre, and how to work out a plot’s area from its sides.
How to Calculate Percentages: 5 Everyday Sums
Five everyday percentage sums, from a percent of a number to percentage change and finding the original number, with worked examples and the mistakes to avoid.
How Many Grams in 1 Bhori of Gold: Ana, Roti, Carat and Price
1 bhori is 11.664 g. Convert bhori, ana, roti and point to grams and back, see what 22, 21 and 18 carat mean, and work out a gold price with making charge and VAT.
How Many Units Does an AC, Fan or Fridge Use? From Watts to Your Bill
Turn an appliance’s watts and hours into units (kWh), then see what those units really add to your bill once BERC’s 2026 slabs and the lifeline rule apply.
House Rent Law in Bangladesh: What the 1991 Act Says
Standard rent, rent increases, advance rent, receipts, eviction and the Rent Controller under the Premises Rent Control Act 1991, with section numbers and quotes from the official text.
Date & Time
More Date & Time calculatorsHow to Calculate Age From Date of Birth in Years, Months and Days
Work out exact age by hand: complete years, then complete months, then days, with month-end and 29 February birthdays explained in a worked example.
How the Bangla Calendar Works: Months, Leap Years and the 2019 Revision
The rules of Bangladesh’s revised Bangla calendar: month lengths, Pohela Boishakh on 14 April, the leap-year Falgun, the six seasons and the national days’ Bangla dates.
How Many Days Between Two Dates: End Date, Months and Working Days
Count the days between two dates by hand: whether to include the end date, calendar months and days, leap years, and working days without Fridays and Saturdays.