Equivalent annual cost calculator
Convert a stated purchase, constant annual maintenance and final salvage into an equivalent yearly cost.
Open calculatorWhat’s on your mind?
Find a little clarity. Search by name, or pick a category.
Something new: Internet speed test → Check your connection with a speedometer and a running bunny.
Showing 289–312 of 321 tools · Page 13 of 14
Dividend and holding period total return calculator
Separate cash dividends, price change and fees for one purchase and one final sale.
Open calculatorCash versus installments present cost calculator
Compare an upfront cash price with down payment, upfront fees and a fixed monthly installment offer.
Open calculatorAge calculator in years months and days
Find calendar age on a chosen date, with an explicit February 29 convention and a visible date breakdown.
Open calculatorWorking days calculator with custom holidays
Count working days with chosen weekends, endpoint rules and your own Indian state, bank or employer holiday dates.
Open calculatorAnnual step-up SIP calculator
Compare a growing monthly investment schedule with a constant assumed return and an annual contribution step-up.
Open calculatorGold grams to sovereign and price calculator
Convert Indian eight-gram gold units and compare entered quote bases, fineness and making charges in one calculation.
Open calculatorSMS character and segment calculator
Estimate GSM-7 or Unicode message segments, including extension characters, emoji code units and per-segment capacity.
Open calculatorHRA exemption calculator for tax year 2026–27
Compare the three HRA limits for an unchanged rental period under the current eight-city location rule.
Open calculatorResident rent TDS calculator for tax year 2026–27
Estimate the supported individual or HUF rent-withholding case at unchanged rent within one tax year.
Open calculatorEPF interest calculator from monthly credits
Estimate one financial year of interest from an opening EPF balance and twelve actual account credits.
Open calculatorPPF vs FD annual contribution calculator
Compare equal annual savings under explicit PPF eligible-month and monthly-compounded FD assumptions.
Open calculatorChmod permissions and umask calculator
Calculate octal permission bits, symbolic display and a separate new-object umask example.
Open calculatorTaylor and Maclaurin approximation calculator
Compare Taylor polynomials for exp, sin, cos and log(1+x), including an analytic truncation bound and SVG overlay.
Open calculatorPolynomial tangent normal and curvature calculator
Find a tangent and normal, inspect local curvature and compare a linear prediction with the actual polynomial.
Open calculatorPolynomial minimum and maximum on an interval
Compare endpoints and approximate stationary candidates for a degree-six-or-lower polynomial on a closed interval.
Open calculatorPolynomial root calculator with iteration steps
Approximate one real polynomial root using a sign bracket or Newton updates, with residuals and honest stopping states.
Open calculatorNatural cubic spline interpolation calculator
Interpolate ordered data with natural endpoint conditions, inspect local cubic coefficients and evaluate slope and curvature.
Open calculatorTwo-variable polynomial Jacobian calculator
Build the derivative matrix of a two-output polynomial map and compare a local linearization with its actual displacement.
Open calculatorPolynomial vector field divergence and curl calculator
Plot sampled two-dimensional field arrows and calculate local divergence and scalar curl from analytic partial derivatives.
Open calculatorPolynomial ODE initial value calculator
Compare fixed-step Euler, Heun or classical RK4 with a half-step run for y′=P(x,y).
Open calculatorReal 2×2 singular value decomposition calculator
Decompose a real two-by-two matrix, inspect its singular values and check reconstruction error.
Open calculatorFinite polynomial quotient ring calculator
Calculate residues, powers and inverses in Fₚ[x]/(m), with a genuine irreducibility check.
Open calculatorTiered sales commission calculator
Calculate progressive commission bands with a visible breakdown of eligible sales and commission in each tier.
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