Scientific Calculator

A free scientific calculator laid out key for key like the Casio fx-83GTX and fx-85GTX, the calculator most students take into their GCSE exams. Practise here and the real one feels familiar: fractions, surds and π come out exact, and every SHIFT and ALPHA function works.

SHLC fx-83GTX layout
D

History

Your answers land here and stay on this device. Tap a line to edit it, or Use in sum to put its answer into your next sum.

Stored values

Graph

SHLC extra

Make a table or solve a polynomial to see its graph.

Gold labels: press SHIFT first Pink labels: press ALPHA first Type on your keyboard and the keys light up

Graph

SHLC extra

Make a table or solve a polynomial to see its graph.

Teaching GCSE maths?Send your class the same keys they will use in the exam.
New: GCSE Calculator Skills Not sure which keys to press? Watch the exact key presses for 31 exam skills, one step at a time, then do them yourself with new numbers. Open the trainer

History

Your answers land here and stay on this device. Click a line to edit it, press Use in sum to drop its answer into your next sum, or press ▲ on the calculator to scroll back like the real one.

Stored values

Find Your Way Around

S⇔DorSHIFT+≈=

Exact Answers, Then S⇔D

1 ÷ 3 gives 13 and sin 45 gives √22, just like your calculator. S⇔D cycles to a recurring decimal, then a decimal. SHIFT = gives the decimal straight away.

Practise it in the trainer
SHIFTALPHASTO+A(−)

SHIFT, ALPHA And STO

SHIFT gives a key’s gold label, ALPHA its pink letter. STO then a pink key saves the answer: STO (−) stores it in A. SHIFT STO opens RECALL.

Practise it in the trainer
SHIFT+SETUP21

SETUP Menu

Numbered like the real one. 2 then 1 sets degrees. 3 sets Fix, Sci or Norm. 1 switches fraction answers to decimals. ▼ goes to page 2 for Statistics and Table.

Practise it in the trainer
MENU234

MENU: Statistics, Table, Ratio

2 is Statistics for the mean, median and quartiles, with a Freq column from SETUP ▼ 5. 3 makes a table of values. 4 finds the missing number in A:B = X:D. 5 Equation/Func and 6 Inequality are extras that match the fx-991 style.

Practise it in the trainer
MENU56orSHIFT+SOLVEx3

Extras: Equations And SOLVE

Not on the real fx-83GTX: these match the fx-991 style. MENU 5 solves simultaneous equations and polynomials up to x⁴, exact like 1 + √3 or a ± bi. MENU 6 solves inequalities. SHIFT x³ is SOLVE (ALPHA x³ types =), SHIFT OPTN is CALC.

OPTN3

Extras: Graph, GCD, LCM And ÷R

OPTN 3 has GCD, LCM, Int, Intg and ÷R: 17 ÷R 5 gives Q=3, R=2. Make a table or solve a polynomial and a Graph appears beside the calculator, with roots, turning points and the y-intercept marked.

Keyboard Shortcuts

Each key shows what it does. The small gold label is what it does with Shift held, just like the gold labels on the calculator. Click a key to try it.

`TabwyuiCapshjkShift\zbShift

Point at a key to see what it does.

Why Practise On An fx-83GTX Layout?

In a GCSE calculator paper, time goes on hunting for keys. This calculator puts every key where it sits on the Casio fx-83GTX and fx-85GTX, with the same gold SHIFT and pink ALPHA labels, so the buttons your fingers learn here are the buttons in the exam hall.

  • Answers come out exact first, as fractions, surds and multiples of π, then S⇔D swaps to a decimal.
  • Fractions, mixed numbers, powers, roots, logs and recurring decimals type in the natural way, as they look in a textbook.
  • Degrees, radians, Fix, Sci and Norm all live in SETUP, and STO, RECALL and M+ keep your values between sums.
  • MENU has the same four modes as the real one: Calculate, Statistics (with frequency tables and regression), Table and Ratio.
  • Extras in the fx-991 style, labelled as extras so the real keys stay clear: MENU 5 Equation/Func and MENU 6 Inequality, SOLVE and CALC, GCD, LCM and remainders in OPTN 3, and a Graph of your table or equation.
  • Your settings, stored values and history stay on this device for next time, and any line of history can go straight back into a new sum.

Not sure which keys to press? The GCSE calculator skills trainer shows the exact key presses for prime factors, HCF and LCM, standard form, trig, tables and statistics, then lets you try them. Need a calculator that shows the working instead? Try our free maths calculators, each one explains its method step by step.