What's new and updates

This section provides information about what's new and the updates of the website calculators.solutions.

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#20260905 (09/05/2026)

New scientific calculator, built on the model of the Calculate application of a TI-Nspire CX: you write a whole calculation on one line, press Enter, and it stacks on top of the previous one — the screen therefore keeps the entire chain of calculations instead of showing a single number. It covers trigonometry in degrees, radians and gradians, logarithms, exponentials, powers and roots, factorials, combinations and permutations, gcd, lcm, modulo, rounding, statistics over a list of values and random draws. Implied multiplication is understood (2π, 3(4+1), 2sin(30)), parentheses left open are closed for you, and a decimal answer matching a fraction, a multiple of π or the square root of a whole number is also shown in its exact form. Answers can be stored in variables with the → arrow, ans recalls the last one, clicking an earlier line puts it back on the entry line, and the 2nd key reaches the second function of each key as on the original machine. An abc key shows the letters: everything is therefore reachable with a finger, without a computer keyboard, phones included. Numbers follow US conventions: the period is the decimal separator, and a comma written outside a function call is read as a thousands separator, so 1,250,000÷8 gives 156250.
New graphing calculator: you type f₁(x) and the curve is drawn as you type, with no key to press. Up to six curves can share the same axes, each in its own color, with a dot to hide one without erasing its formula. The axes are panned by dragging, zoomed with the wheel, a two-finger pinch or the + and − keys, and four buttons cover the usual cases: Standard, Square, Trig — from −2π to 2π, graduated in multiples of π — and Zoom Fit, which fits the y range to the values the curves actually take.
It studies the function as much as it draws it: zeros, local extrema with their nature, y-intercept and intersections with a second curve are found on their own within the window shown, and every point found can be centered on screen or kept in the history. One tab gives the derivative and the equation of the tangent line at a point, which can be drawn dashed, as well as the integral between two bounds, with the area shaded under the curve. A last tab produces a table of values, exportable as CSV or PDF through the results history.
A formula may contain letters: writing ax+b makes two sliders appear under the function list, and the line rotates and shifts as you drag them. Twelve letters can be used — a, b, c, d, h, k, m, n, p, q, r, t — each with its value, its bounds and a button that sweeps it on its own between them: that is where you see what a coefficient does to a curve, a parabola opening then flipping over, a sine wave sliding along. There is nothing to declare, the slider appears with the letter and leaves with it, and two functions using the same letter move together.
An f′ button on each row plots the curve of the derivative, dashed and in the color of the function. The increasing and decreasing intervals then read themselves: the curve rises where the dashed line is above the axis, falls where it is below, and has an extremum where it crosses.
Both calculators can save their screen as an image and produce a share link. The image is a PNG at twice the size shown, always on a light background so it stays readable in print; the graphing calculator adds the legend of the curves and the page address. The link holds everything — for the scientific calculator the calculations, their answers, the variables and the settings; for the graphing calculator the formulas, the window, the angle mode, the parameters and the derivatives shown. Whoever opens it gets exactly the same screen and can carry on from there. Nothing is stored on the site, everything is held in the address, and no account is needed.
A Keep my calculations switch sits at the bottom of both calculators. It keeps in the browser what you left on screen, and puts it back on your next visit, even after closing the tab. Nothing is sent over the internet: everything stays on this device. The switch is off to begin with, because on a shared machine finding the previous visitor's work would not be pleasant, and switching it off erases at once whatever had been kept.

#20260817 (08/17/2026)

In the calculator, the division button now shows the ÷ symbol instead of /, to match the multiplication button, which already shows ×.

#20260730 (07/30/2026)

The calorie counter now takes salt into account: the amount is shown line by line, in the meal total and in the food list, together with the guideline of no more than 5 g per day (WHO). Salt is also included in the results history and in the CSV and PDF exports. The values for the 263 foods come from the ANSES Ciqual food composition table, supplemented by Open Food Facts for the products it does not cover.
Three foods added to the calorie counter: Wasa Fibres crispbread, egg white and skimmed milk powder.

#20260726 (07/26/2026)

Added the tip calculator: from the bill amount, a percentage (10 / 15 / 18 / 20% buttons, slider or free entry) and the number of diners, it shows the tip, the total to pay and each person's share. It can also round the total up to the next whole number, 5 or 10, break down the bill and tip per person, and compare the usual rates in a table. Includes a US and UK tipping guide.

#20260725 (07/25/2026)

The time calculator now supports milliseconds: enable the Milliseconds option below the input fields to add a fourth box to each row and to the result. Addition, subtraction, carry and conversion to days/hours/minutes/seconds all take them into account, and your choice is remembered from one visit to the next.

#20260713 (07/13/2026)

Launch of calculators.solutions 🎉 — the English version of ma-calculatrice.fr, with simple, free online calculators for math, time, finance, conversions, geometry, tech and health.