Maths

Type the whole expression, with brackets if you like, and the answer appears as you type.

The same expression engine as the basic one, with trigonometry, logarithms, powers and constants.

Type a function of x and the curve is drawn straight away. Set the range below the field.

Enter the coefficients and the equation is solved, with the discriminant and vertex thrown in.

Enter three of the six measurements, at least one of them a side, and the rest are worked out.

Pick a shape, enter the measurements, and area and perimeter appear straight away.

Pick a solid, enter the measurements, and volume and surface area appear straight away.

Enter two points in the plane and the distance, midpoint and equation of the line are worked out.

Three common percentage questions, each with its own answer. Type your numbers and the result updates as you go.

Type in either field and the other fills in. The fraction is reduced automatically.

Choose decimal places or significant figures, and the result appears under each of the common rules.

Type the number in the base you are starting from, and it appears in all the common bases at once.

Type in either field and the other fills in. Works for the numbers 1 to 3,999,999.

Paste your numbers, one per line or separated by commas, and the whole summary is worked out.

Enter a number and it is broken into primes. Further down are the highest common factor and the lowest common multiple.

Enter two fractions and choose an operation, and the answer appears reduced with the working below.

Choose the range and how many, and the numbers are drawn with randomness nobody can predict.

Choose how many dice and how many sides, then roll.

Pick a preset or set up the cup yourself, and roll. Your phone replaces the dice; you keep score as usual.

One press, heads or tails, exactly half each.

Paste the list, choose how many to draw, and draw.

Convert between probability, decimal odds, fractional odds and American odds.

Choose the cards in one suit for you and dummy in bridge to see how to play the suit for as many tricks as possible, and how good the chances are.

Choose the cards to see how often your hand wins, how many outs you have and whether a call pays.

Choose your hole cards, the board and your opponents’ hands to see what share of the pot each hand takes.

Choose the cards to see your winning chance in short deck, played with sixes to aces only.

Choose your cards and the cards you can see in front of your opponents to see how often each hand wins at showdown.

Choose your hand to see which cards to hold and how often the draw makes the hand you are aiming for.

Choose the table rules to see the best play for every hand against the dealer’s card and how much the house wins in the long run.

Choose the wheel to see the payout, the chance of winning and the house edge for every bet.

Choose the number of decks to see how often banker, player and tie win and what each bet costs.

See the payout, the chance of winning and the house edge for every craps bet, and how free odds lower the edge on the line bets.

Click the board to set up the position and see how many of the 36 rolls hit, and which ones.

Enter the pip counts in a race with no contact to see your winning chance and whether to double and take.