Calcaholic Updates
What is new here: calculator launches, data refreshes, and improvements worth knowing about, newest first. When the numbers, formulas, or tools change, we say so.
Follow by RSS, or read how we verify our calculators.
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Four more math calculators
Added long division with the steps narrated a digit at a time, a rounding calculator that gets the 1.005 case right where floating point usually gets it wrong, combinations and permutations, and scientific notation.
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Cite and feedback tools on every calculator
You can now copy an APA, MLA, or plain citation for any calculator, and tell us with a thumbs up or thumbs down whether a tool actually helped.
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Dark mode arrived
Calcaholic now follows your device light or dark setting automatically, with a manual toggle in the header that remembers your choice.
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Freshness stamps on data driven calculators
Calculators whose answers depend on published figures (tax brackets, VA rates, contribution limits, cost averages, API prices) now show when we last reviewed that data. Timeless math like fractions and derivatives gets no stamp, because a review date on arithmetic would be noise pretending to be diligence.
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An updates log and a how we verify page
We started publishing this log so you can see when calculators launch, when the numbers behind them get refreshed, and what changed. The new how we verify page explains how we check that the math is right.
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Cooking and Kitchen plus Unit Conversions categories
Two new categories went live. Cooking and Kitchen has cups to grams by real ingredient density, butter and oven conversions, recipe scaling, and pan sizes. Unit Conversions covers millimeters to inches, kilograms to pounds, milliliters to ounces, and more, each with the exact factor and a worked example.
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Shift and work hours calculators
Two new payroll tools, each with an honest note on overtime: the federal rule is weekly over 40, and only some states add a daily rule on top of it.
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Time and date calculators
Added a time duration calculator, a road trip planner, and an upgraded time card with per week overtime and a print button.
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Derivative calculator: graphs, tangent lines, and check my answer
The derivative calculator now graphs a function beside its derivative, draws the tangent line at a chosen point, handles fourth and fifth derivatives, and can check your own answer for equivalence and tell you which mistake you probably made.
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Corrected the derivative calculator description
It said the tool handled any function. It now names what it actually supports: polynomials, trigonometric, exponential, and logarithmic functions. An overpromise is a bug.
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Math pages now show their work
Math, statistics, and geometry calculators walk through the steps using the numbers you actually entered, not just a canned example. The steps come from the same code that produces the answer, so the two can never disagree.
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2026 Roth IRA contribution limits
Updated to the IRS figures for the 2026 tax year: $7,500, or $8,600 if you are age 50 or older, which is a catch-up of $1,100.
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Step by step derivative calculator
A full symbolic differentiation engine that shows every rule it applies, free, with graphs, higher order derivatives, and a check my answer tool.
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Geometry, probability, and roots
Added circle, triangle, and right triangle solvers, sphere, cylinder, and cone volumes, a dice roller, a random number generator, square roots in simplified radical form, GCF and LCM, and a probability calculator.
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Calcaholic went live
The site launched with our first wave of fast, free, no clutter calculators across grades, math, statistics, finance, and health.