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🏠 Home, food & hobbiesFree
Pizza party calculator
10 guests eating 3 slices each need 30 slices, so with 8-slice pies you order 4 pizzas and keep 2 slices spare: the count always rounds up to whole pies.
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Popcorn yield calculator
A quarter cup of kernels pops into 8.75 cups of popcorn, because popcorn swells about 35 times: enter kernels by volume or weight and size the bowl before the…
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Quarantine food calculator
4 people staying home for 14 days, at 2 servings of rice each per day, need 112 servings of rice: list your staples and get the total servings for each one.
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Self-rising flour calculator
For 120 grams of all-purpose flour, add 6 grams of baking powder (1.5 teaspoons) and 1.5 grams of salt (a quarter teaspoon).
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Steak cook time
A one-inch medium-rare steak needs 3 minutes per side in a hot pan, 6 minutes in all, and three and a half per side on the grill.
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Taco bar calculator
Twenty guests at three tacos each need 60 tacos and 60 shells, 120 ounces of cooked meat (7.5 pounds) and 150 ounces of toppings.
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🏠 Home, food & hobbiesFree
Thanksgiving calorie calculator
Two servings of turkey, three of sides, one slice of pumpkin pie and two glasses of wine add up to 1,483 kilocalories.
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🏠 Home, food & hobbiesFree
Turkey defrost time
A 12-pound frozen turkey needs 3 days in the refrigerator, or 6 hours in cold water. Enter the weight in pounds, choose fridge or sink, and get the thaw time in…
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Turkey thawing calculator
A 12-pound turkey needs 2.4 days in the refrigerator or 6 hours in cold water. Enter the weight, pick the method and know when the bird must leave the freezer…
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🏠 Home, food & hobbiesFree
Wedding alcohol calculator
100 guests at a 5-hour reception need 500 drinks: with a 30/50/20 mix that is 150 beers, 50 bottles of wine and 7 of liquor.
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➗ MathFree
Associative property of addition
(2 + 3) + 4 and 2 + (3 + 4) both equal 9, so the associative property holds. Enter any three numbers and see both groupings worked out side by side, with a…
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➗ MathFree
Area of a quadrilateral
The rectangle with corners at (0, 0), (4, 0), (4, 3) and (0, 3) has an area of 12. Enter the four corners of any quadrilateral as coordinates, in order around…
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➗ MathFree
Average percentage calculator
Scores of 80, 90 and 70 percent average out to 80 percent. Paste exam scores, conversion rates or survey results already written as percents, with or without…
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➗ MathFree
Average calculator
The average of 2, 4, 6, 8 and 10 is 6: the numbers add up to 30 and there are 5 of them. Paste a list of scores, prices or readings and get the plain…
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➗ MathFree
Base of a triangle calculator
A triangle with an area of 10 and a height of 4 has a base of 5: double the area and divide by the height.
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➗ MathFree
Bessel function calculator
J₀(1), the Bessel function of the first kind of order 0 at 1, is about 0.765197686558. Enter a whole-number order from 0 up and a real value, and get Jn(x) for…
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➗ MathFree
Convert fraction to percentage
Enter a numerator and a denominator and read the percentage: 3/4 is 0.75 as a decimal and 75%, and an improper fraction such as 5/4 gives 125%.
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➗ MathFree
Crescent area calculator
Get the moon-shaped area that one circle keeps outside another: two circles of radius 5 with centers 5 apart leave a crescent of 47.830573874526 on each side.
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➗ MathFree
Pipe cross-sectional area
Turn a pipe's inner diameter into the open area of its bore: a diameter of 10 gives 78.539816339745 square units.
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➗ MathFree
Csc calculator
Get the cosecant of any angle in degrees or radians: csc 30° is 2, because the sine of 30° is 0.5.
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➗ MathFree
Dividing radicals calculator
√8 divided by √2 is exactly 2, and √8 over √3 simplifies to 2√6/3. Enter each radical's number and root index to get the quotient fully simplified, with the…
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➗ MathFree
Distributive property calculator
Enter three numbers and watch 3(4 + 5) become 3·4 + 3·5, then 12 + 15, then 27. Each step of the distributive property is shown next to the answer, so a student…
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➗ MathFree
Divide complex numbers
(3 + 4i) divided by (1 + 2i) is 2.2 − 0.4i. Enter the real and imaginary parts of both numbers and get the quotient's two parts, worked out through the…
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➗ MathFree
Exponential notation converter
1234.5 becomes 1.2345 × 10^3, and 1.5 × 10^2 expands back to 150. Pick the direction, type the number in decimal, e-notation or the textbook spelling, and get…
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➗ MathFree
Factor calculator
The factors of 12 are 1, 2, 3, 4, 6 and 12, six in all. Enter any positive whole number up to one trillion and get its complete, ordered list of divisors, with…
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➗ MathFree
Factoring trinomials calculator
x² + 5x + 6 factors into (x + 2)(x + 3). Enter the three coefficients and get the pair of binomials a classroom expects, found with integer pairs or the AC…
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➗ MathFree
Fifth root calculator
The fifth root of 32 is 2, and the fifth root of −32 is −2, because an odd root keeps the sign. Enter any finite number and get its one real fifth root, with…
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➗ MathFree
Fermat's little theorem calculator
2 to the 6th modulo 7 leaves 1, exactly as Fermat's little theorem predicts. Enter a base a and a prime p to get the residue of a to the p minus 1 modulo p…
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➗ MathFree
Greatest common divisor
Enter two integers and get their greatest common divisor by Euclid's method: 48 and 18 give 6 after three remainder steps, and 1071 and 462 give 21.
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➗ MathFree
Half-angle formulas
Enter an angle in degrees and get the sine, cosine and tangent of half of it, with the right signs: 90° gives 45°, where sine and cosine are √2/2 and the…
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➗ MathFree
Greatest common factor calculator
Enter a list of integers and get the largest number that divides every one of them: 12, 18 and 24 share 6.
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➗ MathFree
Hexagon calculator
A regular hexagon with a side of 2 has a perimeter of 12 and an area of about 10.3923. Type the one length you know and get the surface for material and the…
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➗ MathFree
Inverse modulo calculator
The inverse of 3 modulo 11 is 4, because 3 times 4 is 12, which leaves remainder 1. Enter a and the modulus to get the unique inverse from 0 to m minus one, or…
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➗ MathFree
Isosceles trapezoid area
Type the two parallel bases and the perpendicular height of an isosceles trapezoid and get its area straight away: bases of 10 and 6 with a height of 4 give 32.
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➗ MathFree
Least common multiple
Enter a list of whole numbers and get their least common multiple, the smallest positive number all of them divide into: 12, 18 and 24 give 72.
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➗ MathFree
Least to greatest fractions
Type several fractions and get them back sorted from least to greatest without rounding: 1/2, 1/3, 1/4 and 3/4 come out as 1/4, 1/3, 1/2, 3/4.
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➗ MathFree
Length of a rectangle calculator
Divide a rectangle's area by its known width to get the length: an area of 48 with a width of 6 gives a length of 8.
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➗ MathFree
Linear combination calculator
Multiply each vector by its coefficient and add the results component by component: 2 times (1, 0) plus 3 times (0, 1) gives (2, 3).
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➗ MathFree
Linear-feedback shift register
Give a starting row of bits, the tap positions and a number of steps, and get the bit stream of a Fibonacci LFSR: seed 1000 with taps 4 and 1 over 8 steps emits…
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➗ MathFree
Line of intersection of two planes
Enter the coefficients of two planes and get the line where they meet, as a point and a direction: x+y+z and x−y+z, both set to 1, meet along the line through…
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➗ MathFree
Log2 calculator
Enter a positive number and get its base-2 logarithm, the power of two that produces it: log2 of 8 is 3, of one half is −1, and of 10 about 3.321928094887.
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➗ MathFree
Mean calculator
Add up a list and divide by how many numbers it holds: 2, 4, 6, 8 and 10 sum to 30, so the mean is 6.
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➗ MathFree
Long multiplication calculator
Multiply two whole numbers the schoolbook way and see every partial product: 123 times 45 gives the rows 615 and 4920, which add up to 5535.
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➗ MathFree
Möbius strip calculator
Give the band width and the centreline radius and get the Möbius strip's area and its single edge: a band 1 wide on a radius of 2 has an area of 4π and an edge…
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➗ MathFree
Multiply complex numbers
Multiply two complex numbers in rectangular form: (1 + 2i)(3 + 4i) gives −5 + 10i, using (ac − bd) + (ad + bc)i with i² replaced by −1.
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➗ MathFree
Logical NOR calculator
False NOR false is true, and every other pair gives false. Enter two true-or-false values and get the NOR result with the expression written out, ready to check…
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➗ MathFree
Null space calculator
The rows (1, 2, 3) and (2, 4, 6) have rank 1, so their null space needs two basis vectors: (−2, 1, 0) and (−3, 0, 1).
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💰 Finance & moneyFree
Costa Rica aguinaldo calculator
Your aguinaldo is one twelfth of everything earned from 1 December to 30 November: twelve months at ₡600,000 come to an aguinaldo of ₡600,000.
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💰 Finance & moneyFree
Costa Rica net salary calculator 2026
On ₡1,000,000 gross a month, an employee in Costa Rica takes home ₡883,500 in 2026: ₡108,300 goes to the CCSS and ₡8,200 to income tax, because the first…
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💰 Finance & moneyFree
Costa Rica employer payroll charges 2026
A ₡1,000,000 monthly salary costs a Costa Rican employer ₡1,268,300 in 2026, because ₡268,300 in social charges, the 26.83%, comes on top.
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💰 Finance & moneyFree
Costa Rica severance calculator
Thirty months on an average ₡600,000, then a dismissal without just cause: the settlement comes to ₡2,040,000 in notice pay, cesantía, 7 unused vacation days…
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✅ ValidationFree
Costa Rica ID number validator
Enter 1-0234-0567 and you learn it is a valid personal cédula, stored as 102340567 and shown in its usual hyphenated form.
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📄 Documents & PDFAPI
Convert HTML to PDF
Turn an invoice template or a rendered report written in HTML into a PDF that looks exactly like the page a modern browser draws, with your CSS, web fonts and…
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$0.040
📄 Documents & PDFAPI
URL to PDF
Keep a competitor's advertised claims, a government notice or a partner's terms exactly as they appeared on a given date, before the page is edited or taken…
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$0.040
📄 Documents & PDFAPI
Convert Markdown to PDF
Release notes, a wiki page or an AI-written report in Markdown become a typeset PDF where tables are not sliced at the page edge and headings never sit alone at…
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$0.040
📄 Documents & PDFAPI
Text to PDF
Contract clauses sent as plain text with the title Contrato, A5 paper and 14-point type come back as a tidy 3-page PDF, line breaks kept and long lines wrapped…
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$0.002
📄 Documents & PDFAPI
JPG to PDF
Three photos of a damaged part, or several receipts snapped on a phone, become one PDF with one page per image, in the order you set and with each orientation…
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$0.002
📄 Documents & PDFAPI
Merge PDF files
Turn a contract, its annexes and the signature page into one clean PDF instead of a folder of loose files.
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$0.008
📄 Documents & PDFAPI
Split a PDF
Cut a three-page PDF every two pages and you get two files: pages 1 and 2, then page 3. Burst a statement run into one file per customer or pull the signature…
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$0.002
📄 Documents & PDFAPI
Extract PDF pages
Pages 12 to 18 of a 400-page report become a PDF of their own, with the same layout, the same fonts and crisp graphics.
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$0.002
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Create an account with your email and add balance when you need it. No subscription, no sales call.
2
Call the endpoint
One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.
3
Collect the result
Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.
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On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.
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The full API — 7800+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.
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