Calculator Tools

100 free online calculators — compound interest, loan EMI, mortgage, BMI, TDEE, percentage, GPA, age calculator, SIP investment, salary after tax, ROI, tip, discount and more. Instant results, no sign-up required.

100Free Calculators
10Categories
FreeNo Sign-up
InstantResults
Engineering & Construction
Concrete volume, bricks, paint coverage, roof pitch, flooring, tiles, land area and room size
10 tools
01Concrete Volume Calculator→
02Brick Calculator→
03Paint Coverage Calculator→
04Roof Pitch Calculator→
05Flooring Calculator→
06Stair Calculator→
07Land Area Calculator→
08Room Size Calculator→
09Cement Sand Aggregate Calculator→
10Tile Calculator→
Miscellaneous Viral Calculators
Love compatibility, sleep cycle, tip, discount, fuel cost, car loan and electricity bill calculators
10 tools
01Love Compatibility Calculator→
02Sleep Cycle Calculator→
03Random Number Generator→
04Password Strength Calculator→
05Tip Calculator→
06Discount Calculator→
07Fuel Cost Calculator→
08Car Loan Calculator→
09Internet Speed Calculator→
10Electricity Bill Calculator→

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Frequently Asked Questions
How do I calculate compound interest?
Compound interest is calculated with A = P(1 + r/n)^(nt), where P is principal, r is annual rate, n is compounding frequency per year, and t is years. Our free Compound Interest Calculator handles all variables instantly — just enter your principal, rate, tenure and compounding period to see your total maturity amount and interest earned.
How is Loan EMI calculated?
Loan EMI = [P × r × (1+r)^n] / [(1+r)^n – 1], where P is loan principal, r is monthly interest rate (annual rate ÷ 12 ÷ 100), and n is total months. Use the free Loan EMI Calculator to instantly calculate monthly instalments for home loans, car loans, personal loans, or any other loan amount.
How do I calculate percentage increase?
Percentage increase = ((New Value − Old Value) ÷ Old Value) × 100. For example, if a salary goes from ₹50,000 to ₹60,000, the increase is ((60,000−50,000)÷50,000)×100 = 20%. Use our free Percentage Increase Calculator or Pay Raise Percentage Calculator for instant results.
How is GPA calculated?
GPA = Sum of (Grade Points × Credit Hours) ÷ Total Credit Hours. On a 4.0 scale: A=4.0, A−=3.7, B+=3.3, B=3.0, C=2.0, D=1.0, F=0.0. Enter your courses, credits and grades in the free GPA Calculator to get your semester GPA and cumulative CGPA instantly.
What is ROI and how to calculate it?
ROI (Return on Investment) = ((Net Profit ÷ Cost of Investment) × 100). For example, investing ₹1,00,000 and earning ₹1,40,000 gives ROI = ((40,000 ÷ 1,00,000) × 100) = 40%. Use our free ROI Calculator, Advertising ROI Calculator, or SEO ROI Calculator for specific business use cases.

About ToollLive Free Online Calculator Tools

ToollLive offers 100 free online calculators across 10 categories — the most complete free calculator suite on the internet. Start with the compound interest calculator and SIP investment calculator for investment planning, then use the loan EMI calculator and mortgage calculator for debt management. Our salary after tax calculator, freelance rate calculator and net worth calculator help manage personal finances. Business owners use the profit margin calculator, ROI calculator, break-even calculator and startup runway calculator for critical decisions. Digital marketers rely on the CTR calculator, CPC calculator, YouTube earnings calculator and Instagram earnings calculator. Students and educators love the GPA calculator, CGPA calculator and grade percentage calculator. Essential daily calculators include the age calculator, percentage calculator, tip calculator, discount calculator and fuel cost calculator. All calculators are free, mobile-friendly, and work instantly with no registration required.