CalcGlobe is a free all-in-one calculator and unit converter platform. 60+ calculators covering finance, science, engineering, medical reference, construction and health. No signup needed. Works on any device.
CalcGlobe's free unit converter supports 80+ categories including length, mass, temperature, speed, volume, area, pressure, energy, electrical units, and currency. Convert between metric and imperial units instantly. Popular conversions include ft to mm, kg to lbs, Celsius to Fahrenheit, USD to INR, litres to gallons, miles to kilometres, mph to kph, PSI to bar, and hundreds more. The currency converter uses live exchange rates updated daily from the European Central Bank. No signup required.
Quick reference: 1 foot = 304.8 mm. 1 kg = 2.20462 lbs. 0°C = 32°F. 1 mile = 1.60934 km. 1 litre = 0.264172 US gallons. 1 inch = 2.54 cm. 1 PSI = 0.0689476 bar. 1 kW = 1.34102 hp.
Calculate your monthly loan EMI (Equated Monthly Instalment) for home loans, car loans, personal loans, and education loans. Enter your principal amount, annual interest rate, and loan tenure to instantly get your monthly EMI, total payable amount, total interest payable, and a full month-by-month amortisation schedule. Supports INR, USD, GBP, EUR, and AED currencies.
EMI Formula: EMI = [P × R × (1+R)^N] / [(1+R)^N - 1] — where P is the principal loan amount, R is the monthly interest rate (annual rate divided by 12 divided by 100), and N is the number of monthly instalments.
Calculate SIP (Systematic Investment Plan) returns and find out how much wealth you can build by investing a fixed amount every month. Enter your monthly SIP amount, expected annual return percentage, and investment period in years to get your total corpus, total invested amount, and estimated returns. Includes year-by-year growth chart and lump sum calculator toggle.
SIP Formula: M = P × ({[1 + i]^n - 1} / i) × (1 + i) — where M is the maturity amount, P is the monthly SIP amount, i is the monthly return rate, and n is the number of months. Returns are estimated and not guaranteed.
Calculate GST (Goods and Services Tax) on any amount. Supports all Indian GST slabs — 5%, 12%, 18%, and 28%. Works in two modes: Add GST to calculate the final price including tax, or Remove GST to find the original base price before tax. Also supports UK VAT (20%), Australian GST (10%), and custom tax rates. Shows CGST and SGST breakdown for intra-state transactions.
Complete O-ring size reference covering the full AS568 American standard (dash numbers 001 through 475), ISO 3601 international metric standard, BS1806 British standard, and JIS B2401 Japanese standard. Look up any O-ring by code number or inner diameter to find the inner diameter (ID), cross section diameter (CS), and outer diameter (OD) in both millimetres and inches. Includes O-ring material selection guide covering NBR (Nitrile), FKM (Viton), EPDM, Silicone, and Neoprene with temperature ranges and chemical resistance ratings.
Complete IV cannula (intravenous catheter) size reference for clinical use. Covers gauge sizes 14G through 26G with ISO colour codes: 14G orange, 16G grey, 17G white, 18G green, 20G pink, 22G blue, 24G yellow, 26G purple. Shows flow rates in mL/min, outer diameter in mm, inner diameter, and recommended clinical uses for each gauge. Essential reference for nurses, paramedics, emergency medicine staff, and clinical educators.
Calculate the exact quantity of concrete materials needed for any construction project — slabs, foundations, columns, beams, and driveways. Enter your dimensions and concrete mix grade (M10, M15, M20, M25, M30, M35, or M40) to get the volume of concrete in cubic metres and cubic feet, number of 50kg cement bags needed, sand quantity in kg and cubic feet, aggregate quantity, and water required in litres. Includes 5–10% wastage factor adjustment.
Calculate your daily calorie needs using the Mifflin-St Jeor formula — the most accurate BMR equation for most adults. Enter your age, gender, height, weight, and activity level to get your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE). Get personalised calorie targets for weight loss (500 calorie deficit), maintenance, or muscle gain (300 calorie surplus). Includes macro breakdown showing recommended protein, carbohydrate, and fat intake for each goal.
Complete needle gauge reference covering sizes 7G through 34G. Shows outer diameter in mm, inner diameter in mm, and primary clinical uses for each gauge. Used for selecting the correct needle for venepuncture, intramuscular injection, subcutaneous injection, intradermal injection, and IV access. Higher gauge numbers indicate thinner needles. Most common for blood draw: 21G. Most common for IM vaccination: 23G or 25G. Insulin injection: 28G to 32G.
Calculate your monthly mortgage repayment for any home loan. Enter property price, down payment, loan term, and interest rate to get monthly payment, total amount payable, total interest, and full amortisation schedule. Compare fixed rate vs variable rate scenarios. See the impact of extra monthly payments on total interest saved and loan term reduction. Supports USD, GBP, AUD, EUR, INR, and AED.
Calculate compound interest for any investment. Enter principal, annual interest rate, compounding frequency (daily, monthly, quarterly, or annually), and time period to see your final amount and total interest earned. Compare simple interest vs compound interest side by side. Shows year-by-year growth table. Formula: A = P x (1 + r/n) raised to the power of n times t.
Calculate Body Mass Index using the standard WHO formula. Enter height and weight in metric or imperial units. BMI categories: Underweight below 18.5, Normal weight 18.5 to 24.9, Overweight 25 to 29.9, Obese Class I 30 to 34.9, Obese Class II 35 to 39.9, Obese Class III 40 and above. Also calculates Body Surface Area using Mosteller and DuBois formulas. Used for drug dosing calculations in clinical settings.
CalcGlobe provides 60+ free calculators across 12 categories:
CalcGlobe is a free all-in-one calculator platform built for students, engineers, doctors, builders, finance professionals, and curious minds worldwide. Our mission is to make every calculation accessible to everyone, everywhere on the globe — no signup, no fees, no ads interrupting your work. All calculations are performed locally in your browser. No data is sent to our servers.
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