Ai Calculator

All-in-One Calculator Suite

6 Calculators

Percentage Calculator

Four common percentage operations in one place

What is X% of Y?

X is what % of Y?

Percentage Increase / Decrease

Add / Remove % from a Number

Frequently Asked Questions โ€” Percentage Calculator

A percentage is a number expressed as a fraction of 100. The word comes from the Latin per centum, meaning "by the hundred." For example, 45% means 45 out of every 100. Percentages are used to compare quantities, express discounts, tax rates, interest rates, exam scores, and much more.
Divide the part by the whole and multiply by 100. Formula: (Part รท Whole) ร— 100. Example: 40 is what % of 200? โ†’ (40 รท 200) ร— 100 = 20%.
Formula: ((New Value โˆ’ Old Value) รท Old Value) ร— 100. A positive result means an increase, a negative result a decrease. Example: price went from โ‚น500 to โ‚น650 โ†’ ((650โˆ’500) รท 500) ร— 100 = +30% increase.
Use the "Add / Remove % from a Number" section. Enter your base price and the GST rate (e.g. 18).
  • After Adding โ€” price including GST (e.g. โ‚น1,180 for โ‚น1,000 + 18%).
  • After Removing โ€” pre-tax price if you already know the final amount.

Home Loan EMI Calculator

Calculate your monthly EMI, total interest and repayment amount

Loan Parameters
8.5%
20 Yrs
Monthly EMI
โ€”
Loan Summary
Loan Amountโ€”
Down Paymentโ€”
Total Interest Payableโ€”
Total Repaymentโ€”

* EMI calculated using standard reducing balance formula. For informational purposes only โ€” consult your bank for exact figures.

Frequently Asked Questions โ€” Home Loan EMI Calculator

EMI (Equated Monthly Instalment) is the fixed monthly payment to your lender until the loan is fully repaid. Each EMI has two parts โ€” a principal component and an interest component. Under reducing balance, the interest portion gradually decreases each month.
The standard reducing balance formula is:

EMI = P ร— r ร— (1+r)โฟ / [(1+r)โฟ โˆ’ 1]

Where P = loan principal, r = monthly interest rate (annual rate รท 12 รท 100), and n = total months.
  • Reducing Balance โ€” Interest calculated on outstanding principal. Standard method used by Indian banks.
  • Flat Rate โ€” Interest calculated on original loan amount for entire tenure. Total interest significantly higher.
Yes! Under the Income Tax Act:
  • Section 80C โ€” Up to โ‚น1.5 lakh/year on principal repayment.
  • Section 24(b) โ€” Up to โ‚น2 lakh/year on interest paid (self-occupied property).
  • Section 80EEA โ€” Additional โ‚น1.5 lakh for first-time buyers (conditions apply).
Consult a tax advisor for the latest rules applicable to you.

Car & Bike Loan Calculator

Calculate EMI for your vehicle loan with optional insurance

Car Loan Parameters
9.5%
5 Yrs
Monthly EMI
โ€”
Vehicle Loan Summary
Loan Amountโ€”
Total Interestโ€”
Insurance Costโ€”
Total Repaymentโ€”

Frequently Asked Questions โ€” Car & Bike Loan Calculator

Car loan interest rates in India generally range from 8.5% to 15% per annum depending on your lender, credit score, and vehicle type. A CIBIL score above 750 typically qualifies you for the best rates.
  • Car loans โ€” Maximum tenure is typically 5 to 7 years (84 months).
  • Bike/two-wheeler loans โ€” Maximum tenure is usually 3 to 5 years (60 months).

Steel & Material Weight Calculator

Calculate weight and estimated cost for steel sections and other materials

Material Parameters
Weight Results
Weight per Piece
โ€”
Total Weight
โ€”
Estimated Cost
โ€”
TMT Bar Reference Weight per metre
DiameterWeight / mGrade
8 mm0.395 kgTMT
10 mm0.617 kgTMT
12 mm0.888 kgTMT
16 mm1.580 kgTMT
20 mm2.470 kgTMT
25 mm3.860 kgTMT
32 mm6.310 kgTMT
Material Density Comparison (kg/mยณ)

Frequently Asked Questions โ€” Steel & Material Calculator

Formula: Weight = (ฯ€/4) ร— Dยฒ ร— L ร— ฯ, where D = diameter (m), L = length (m), ฯ = density (kg/mยณ). For mild steel a 20mm ร— 6m rod โ‰ˆ 14.83 kg.
The standard density of mild steel is 7850 kg/mยณ (7.85 g/cmยณ). Other densities: Stainless Steel 7930, Aluminium 2700, Copper 8960, Cast Iron 7200 (all in kg/mยณ).
As a rough reference (2024โ€“25):
  • TMT bars (Fe500) โ€” โ‚น55โ€“70 per kg
  • MS plates / flats โ€” โ‚น60โ€“75 per kg
  • Stainless steel โ€” โ‚น150โ€“300 per kg
  • Aluminium โ€” โ‚น180โ€“220 per kg

SPI / EVM Calculator

Earned Value Management โ€” measure project schedule & cost performance

Project Parameters
60%
50%
Key Formulas:
PV = BAC ร— Planned%  |  EV = BAC ร— Actual%
SPI = EV / PV  |  CPI = EV / AC
EAC = BAC / CPI  |  TCPI = (BACโˆ’EV)/(BACโˆ’AC)
Core EV Values
Planned Value (PV)โ€”
Earned Value (EV)โ€”
Actual Cost (AC)โ€”
Budget at Completion (BAC)โ€”
Variance
Schedule Variance (SV = EVโˆ’PV)โ€”
Cost Variance (CV = EVโˆ’AC)โ€”
Variance at Completion (VAC)โ€”
๐Ÿ“Š
Schedule Performance Index (SPI)
โ€”
SPI = EV / PV โ†’ >1 Ahead, =1 On track, <1 Behind
๐Ÿ’ฐ
Cost Performance Index (CPI)
โ€”
CPI = EV / AC โ†’ >1 Under budget, <1 Over budget
๐Ÿ
Estimate at Completion (EAC)
โ€”
EAC = BAC / CPI โ€” Projected total cost
๐ŸŽฏ
To-Complete Perf. Index (TCPI)
โ€”
TCPI = (BACโˆ’EV)/(BACโˆ’AC) โ€” Required efficiency
EVM Dashboard โ€” PV vs EV vs AC

Frequently Asked Questions โ€” SPI / EVM Calculator

EVM is a project management technique that integrates scope, schedule, and cost to assess project performance. It uses three key values โ€” Planned Value (PV), Earned Value (EV), and Actual Cost (AC) โ€” to objectively measure how well a project is tracking against its baseline.
An SPI < 1 means the project is behind schedule. The team is accomplishing less work than was planned. For example, SPI = 0.8 means only 80% of scheduled work is complete. An SPI > 1 means ahead of schedule, and SPI = 1 means exactly on track.
A CPI < 1 means the project is over budget โ€” spending more than the value of work completed. CPI = 0.9 means every โ‚น1 spent produces only โ‚น0.90 of value. A CPI > 1 means under budget (efficient), and CPI = 1 means exactly on budget.
EAC (Estimate at Completion) forecasts the total cost of the project based on current performance. The most common formula is EAC = BAC / CPI. If EAC > BAC, the project will overrun its budget. Project managers use EAC to decide whether corrective actions are needed.
TCPI (To-Complete Performance Index) tells you the efficiency (CPI) the project must achieve for the remaining work to stay within budget. Formula: TCPI = (BAC โˆ’ EV) / (BAC โˆ’ AC). A TCPI > 1 means the remaining work must be done more efficiently than past work.

Civil Engineering Calculators

Concrete, brickwork, column, beam & more โ€” IS code based

Concrete Mix Design

Or enter dimensions below:

5%
Material Requirements
Wet Concrete Volumeโ€”
Dry Mix Volume (ร—1.54)โ€”
Cement Bags (50 kg each)โ€”
Cement Massโ€”
Sand (Fine Aggregate)โ€”
Coarse Aggregateโ€”
Water Requiredโ€”
Mix Ratio M20
Cement : Sand : Aggregate = 1 : 1.5 : 3
Method (IS 456): Dry volume = 1.54 ร— wet volume (accounts for voids). Cement bags = (1/total_parts) ร— dry_vol ร— 1440 kg/mยณ รท 50 kg/bag. Water = cement_mass ร— w/c ratio.
Brick Masonry Calculator
5%
Brickwork Results
Wall Volumeโ€”
Number of Bricksโ€”
Bricks per mยฒโ€”
Mortar Volumeโ€”
Cement Bags (50kg)โ€”
Sand Requiredโ€”
Material Breakdown
Formula: Number of bricks = Wall Volume รท (Brick Volume with mortar). Mortar volume โ‰ˆ 30% of wall volume. Dry mortar = wet mortar ร— 1.3.
RC Column โ€” IS 456 Short Column
2.0%
Column Results (IS 456 Cl. 39.3)
Gross Area (Ag)โ€”
Steel Area (Asc)โ€”
Net Concrete Area (Ac)โ€”
Factored Load Capacity (Pu)โ€”
Safe Working Loadโ€”
Load in Tonnesโ€”
Load Contribution
IS 456 Clause 39.3 (Short Column):
Pu = 0.4 ร— fck ร— Ac + 0.67 ร— fy ร— Asc
Safe Load = Pu / 1.5 (Factor of Safety against direct loads)
Simply Supported Beam โ€” UDL & Point Load
Beam Analysis Results
Max Shear Force (V)โ€”
Max Bending Moment (M)โ€”
Moment of Inertia (I)โ€”
Modulus of Elasticity (E)โ€”
Max Deflection (ฮด)โ€”
Allowable Deflection (L/250)โ€”
Deflection Checkโ€”
Beam Force Diagram
For Simply Supported Beam:
V_max = wL/2 + P/2 (kN)  |  M_max = wLยฒ/8 + PL/4 (kNm)
ฮด_UDL = 5wLโด/(384EI)  |  ฮด_PL = PLยณ/(48EI) (mm)  |  E = 5000โˆšfck (MPa)

Frequently Asked Questions โ€” Civil Engineering Calculators

When cement, sand, and aggregate are dry-mixed, they contain voids between particles. When water is added and the concrete hardens (cures), these voids compact. The ratio 1.54 accounts for this volume reduction โ€” meaning 1 mยณ of wet concrete requires approximately 1.54 mยณ of dry ingredients. This factor is widely used per IS code practice.
For standard Indian bricks (230ร—115ร—75 mm) with 10mm mortar joints, approximately 500 bricks per mยณ of brickwork (including mortar). For 1 mยฒ of wall (115mm thick), roughly 60 bricks are needed. These are approximate values; actual count depends on brick size, mortar thickness, and wastage.
As per IS 456: 2000, Clause 23.2, the final deflection including long-term effects should not exceed Span/250 for most cases. Additionally, deflection after erection of partitions/finishes should not exceed Span/350 or 20mm, whichever is less. This calculator checks against L/250 as a basic serviceability criterion.
As per IS 456: 2000, Clause 39.3, the design strength of a short axially loaded column is:

Pu = 0.4 ร— fck ร— Ac + 0.67 ร— fy ร— Asc

Where fck = characteristic compressive strength of concrete, Ac = net concrete area, fy = yield strength of steel, Asc = area of steel reinforcement.
As per IS 456, the area of longitudinal steel in a column shall be:
  • Minimum: 0.8% of gross cross-sectional area
  • Maximum: 6% of gross cross-sectional area (to avoid congestion)
A typical design uses 1% to 3% steel ratio for economy and practicality.