Free Calculators
Quick tools for everyday study tasks
No account required - free to use
Amortization
Estimate monthly loan payments based on rate and term.
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Annuity
Calculate the present value of a fixed annuity.
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Break-Even
Find units and revenue needed to cover fixed costs.
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Depreciation
Straight-line depreciation for an asset.
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EOQ
Economic Order Quantity for inventory planning.
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Simple Interest
Compute simple interest and total amount.
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Productivity
Calculate labour productivity by output and labor hours.
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Ratios
Compute gross, operating, and profit margins.
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Project Evaluation
Estimate project payback period from cashflows.
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Inventory Turnover
Calculate inventory turnover ratio and days in inventory.
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Interest
Simple and compound interest calculator with flexible inputs.
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Quadratic Formula
Find real roots for ax^2 + bx + c in seconds.
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GCD & LCM
Quickly compare two numbers and get their gcd and lcm.
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Logarithm
Compute log base b of x using the change of base method.
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Trigonometry
Calculate sin, cos, or tan for one angle.
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Derivative
Differentiate a single-term function with the power rule.
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