Metric Prefix Converter
Convert any number between SI metric prefixes (pico, nano, micro, milli, centi, deci, base, kilo, mega, giga, tera, peta...
Convert any number between SI metric prefixes (pico, nano, micro, milli, centi, deci, base, kilo, mega, giga, tera, peta...
Project future college costs by inflating today's annual tuition (plus room & board) at a chosen cost-growth rate, then...
Compute the round duct diameter in inches required to carry a given airflow (CFM) at a chosen design velocity (typically...
Estimates bond convexity and the percentage price change from a yield shift ΔP/P ≈ −D_mod·Δy + ½·Convexity·(Δy)². Convex...
Compute LDL-cholesterol via the Martin-Hopkins equation, which uses an adjustable TG:VLDL ratio (≈ 5.0 - 6.5) instead of...
Estimate when private mortgage insurance can be cancelled — both at the LTV-80 % "request" threshold and the LTV-78 % "a...
Compute the portfolio-level return as the weighted average of up to four holdings: R = w₁r₁ + w₂r₂ + w₃r₃ + w₄r₄. Report...
Find the internal rate of return — the discount rate at which the net present value of a project equals zero.
Calculate the cash-on-cash return of a leveraged real-estate deal: annual pre-tax cash flow divided by total cash invest...
Compute the future value forgone by spending an amount today rather than investing it at a given annual return for a cho...
Estimates the BTU/hour cooling capacity needed to air-condition a room from its area, ceiling height, insulation, and cl...
Compute the retention ratio (b = 1 − payout) and the sustainable growth rate g = ROE · b — the maximum rate at which a c...
Needs, wants, and savings at 50/30/20 is a starting point — not a rulebook. Here is how to adapt it when your life doesn't fit neatly into t...
A calm, jargon-free walkthrough of what actually drives your monthly mortgage payment — and how to make the number smaller.
We pulled usage data across our 30 most-visited calculators to understand how readers actually use consumer finance tools. Findings, caveats...
The same $250 a month looks unremarkable for a decade and then suddenly dominates the chart. Here is why compounding behaves that way.