Free Online
Calculators

Loan installments with amortization chart, prepayment engine & rate comparison

Investment growth with inflation adj., tax layer, goal-seeking & real vs nominal

SIP corpus with step-up mode, XIRR & 3-scenario simulation

BMI with WHO risk classification, ideal weight & body fat estimate

TDEE with 5 goals, 2 formulas, macros & weekly weight projection

Mifflin vs Harris-Benedict with TDEE at all 5 activity levels

6 simultaneous modes: X% of Y, what %, change, increase & decrease

Expression parser with trig, log, exp, history & DEG/RAD toggle

Mean, median, mode, std dev, IQR, quartiles & histogram

Weighted GPA with Dean's List detection, semester tracking & what-if simulator

Multi-subject percentage with grade estimation, visual charts & reverse mode

Bunk planner, safe leave estimator & attendance warning system with subject tracker

9 units: mm, cm, m, km, in, ft, yard, mile, nautical mile

8 units: mg, g, kg, tonne, oz, lb, stone, carat

Bidirectional C/F/K — type any field, all update instantly

Exact age with zodiac, next birthday countdown, live seconds & time-of-birth precision mode

Days between dates with business-days-only mode

Live countdown to any event with real-time seconds

Concrete volume and bags required for slabs, walls, footings and columns

Cement bags, sand and aggregate for any mix ratio and volume

Sand volume and weight for landscaping, concrete mix and foundation work

IP subnet mask, network/broadcast address, usable hosts and CIDR notation

Hex arithmetic and conversion between hex, decimal, binary and octal

Convert text to ASCII codes, Unicode code points and UTF-8 bytes

Calculate selling price from cost and markup percentage or reverse-calculate margin

Inventory turnover ratio, days in inventory and efficiency vs industry benchmark

Economic Order Quantity for minimum inventory costs with reorder point