π Free Online Calculators
6 essential daily calculators + 200+ free tools. Percentage, discount, tip, GPA, BMI, age β plus water deficit, free fall, roofing, concrete, cash flow, keto, golf handicap, TI-84 online, and many more. All 100% free.
π Percentage Calculator β What is X% of Y?
The most used percentage calculator online. Calculate what is X% of Y, X is what percent of Y, or percentage increase/decrease. Students use this free calculator for math homework, shoppers use it for percent off calculator deals, and professionals use it for data analysis. Fast, accurate, and free online calculator available 24/7. No sign-up needed β just enter your numbers and get instant results.
π·οΈ Discount Calculator β Percent Off & Sale Price
Find the final price after discount with this discount calculator. Also called a percent off calculator, it's perfect for shopping sales, Black Friday deals, and everyday bargains. Enter the original price and discount percentage β the free calculator shows your savings and final cost instantly. Example: $100 with 20% off = $80 final price. Used by millions as a quick calculator for retail, e-commerce, and personal budgeting.
π΅ Tip Calculator β Restaurant Tip & Split Bill
The best tip calculator for dining out. Works as a restaurant tip calculator and split bill calculator β calculate how much to tip and split the total among friends. Standard tipping in the US is 15-20%. This free calculator handles the math so you don't have to. Enter bill amount, tip percentage, and number of people. Perfect for group dinners, date nights, and anyone asking "how much should I tip?" A true daily calculator used worldwide.
π GPA Calculator β Grade & Final Grade Calculator
Calculate your GPA with this grade calculator. Works as a final grade calculator and test grade calculator for students at all levels. Enter letter grades (A, B+, C, etc.) and credit hours β the GPA calculator computes your weighted GPA on a 4.0 scale. Essential for college applications, scholarship eligibility, and academic tracking. Also used as a free online calculator by teachers to verify student grades quickly.
βοΈ BMI Calculator β Body Mass Index
The BMI calculator computes your Body Mass Index using weight and height. Standard body mass index categories: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (30+). This free calculator uses the formula BMI = weight(kg) Γ· height(m)Β². Used by fitness enthusiasts alongside free biological age calculator and free keto calculator tools for complete health tracking. One of the most searched online calculators worldwide.
π Age Calculator β Exact Chronological Age
The simplest age calculator online. Enter your date of birth to get exact years, months, and days instantly. Used for forms, applications, age verification, and curiosity. This free online calculator is 100% accurate and updates in real-time. Also explore our advanced free biological age calculator for health age estimation. The most trusted daily calculator for birthdays and age-related calculations.
π§ 200+ More Free Calculators β All Categories
Beyond these 6 daily calculators, QuickCalc offers 200+ specialized free tools for every need. Medical professionals use our free water deficit calculator to calculate free water deficit in hypernatremia patients. Physics students rely on the free fall calculator for gravity calculations. Contractors use free roofing calculator and free concrete calculator for construction estimates.
Finance experts use free cash flow calculator for calculating free cash flow and unlevered free cash flow calculation. Health enthusiasts use free keto calculator for macro tracking. Golfers trust our free golf handicap calculator. Astrology fans love free starseed birth chart calculator, free angel number calculator, and free twin flame calculator. Students access free TI-84 calculator online and Ti-30xs calculator online free for graphing needs.
All tools are 100% free β no sign-up, no hidden fees, just useful free online calculators available 24/7.
β Frequently Asked Questions β Free Calculators
How do I calculate percentage of a number?
Use our percentage calculator. Formula: (X Γ· 100) Γ Y. Example: 25% of 200 = (25Γ·100)Γ200 = 50. This free online calculator handles all three percentage modes instantly β find % of a number, find what % one number is of another, or calculate % change.
How does the discount calculator / percent off calculator work?
Enter original price and discount %. The discount calculator (also called percent off calculator) computes: Final Price = Original Γ (1 β Discount%/100). $100 at 20% off = $80 final price with $20 savings. Perfect for shopping and sales.
What's the best tip calculator for restaurants?
Our tip calculator is the best restaurant tip calculator and split bill calculator. Standard tip is 15-20%. Enter bill, tip %, and number of people. It shows tip amount, total bill, and per-person cost instantly. A true daily calculator for dining out.
How is GPA calculated on a 4.0 scale?
The GPA calculator converts letter grades: A=4.0, A-=3.7, B+=3.3, B=3.0, B-=2.7, C+=2.3, C=2.0, C-=1.7, D+=1.3, D=1.0, F=0. Multiply each by credit hours, sum, and divide by total credits. Works as final grade calculator and test grade calculator too.
What is a healthy BMI range?
The BMI calculator (Body Mass Index) classifies: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (30+). Formula: weight(kg) Γ· height(m)Β². Combine with free biological age calculator and free keto calculator for complete health tracking.
How accurate is the age calculator?
Our age calculator is 100% accurate. Enter date of birth and get exact years, months, and days. For advanced analysis, try our free biological age calculator which estimates body age based on lifestyle factors.
Do you have a free water deficit calculator?
Yes! Our free water deficit calculator helps calculate free water deficit in hypernatremia. Formula: Free Water Deficit = 0.6 Γ weight(kg) Γ [(serum Na/140) β 1]. Essential free calculator for medical professionals.
Is there a free TI-84 calculator online?
Yes! We offer free TI-84 calculator online and Ti-30xs calculator online free for students. Full graphing calculator functionality without buying hardware. Also Ti nspire calculator online free for advanced CAS needs.
What free calculators do you have for construction?
We offer free roofing calculator, free concrete calculator, free deck calculator, free beam calculator, free truss calculator, free manual j calculator, free hvac duct sizing calculator, free insulation calculator square feet, free electrical load calculator, and free building material calculator.
Are these calculators really 100% free?
Yes! Every calculator on QuickCalc is 100% free. No sign-up, no credit card, no hidden charges. From the percentage calculator to the free cash flow calculator β all tools are free, forever. Just open and use.
β‘ percentage calculator Β· discount calculator Β· tip calculator Β· GPA calculator Β· BMI calculator Β· age calculator Β· free water deficit calculator Β· free fall calculator Β· free roofing calculator Β· free concrete calculator Β· free cash flow calculator Β· free keto calculator Β· free golf handicap calculator Β· free TI-84 calculator online Β· free starseed birth chart calculator Β· 200+ free tools on QuickCalc.