Cooking measurement converter template

Free build guide: Cooking measurement converter for WordPress

This guide rebuilds the Cooking measurement converter from this site in Gravity Forms: 8 inputs, 4 live results and no submit button. Expect about 36 minutes by hand. The template above is the same form as an import file, and the bundle adds a PDF version of this guide with a screenshot of every setting, plus the stylesheet.

You will end up with:

• Result
• Result
• Grams
• Ounces

What you need

• Gravity Forms (any license) — Calculation fields, drop-down values and conditional logic are in core.

Everything here is core Gravity Forms. No add-ons.

1. Create the form

1. Go to Forms → New Form and name it Cooking measurements.
2. In Form Settings → Form Layout, set the CSS Class Name to fo-live-only. Step 3 uses it to hide the submit button.
3. Leave the form open in the editor; the fields come next.

2. Add the fields, in this order

Field IDs are assigned as you add fields. If yours come out differently, change the {Label:ID} references in the formulas to match your IDs. Settings not mentioned stay at their defaults.

1. Convert · Radio Buttons · ID 1
Custom CSS Class (Appearance tab) fo-segmented.

Choices (tick show values and enter each value):

• Volume — value volume (selected by default)
• Weight — value weight
• Cups to grams — value ingredient

2. Amount · Number · ID 2
Number Format 9,999.99; Default Value 1.

3. From · Drop Down · ID 3
Layout: half width, on the same row as its neighbour (drag the field beside it in the editor; no CSS class needed); Conditional Logic (Advanced tab): Show this field if Convert is Volume..

Choices (tick show values and enter each value):

• teaspoon — value 4.929
• tablespoon — value 14.787
• fluid ounce — value 29.574
• cup (US) — value 236.588 (selected by default)
• pint (US) — value 473.176
• quart (US) — value 946.353
• millilitre — value 1
• litre — value 1000

4. To · Drop Down · ID 4
Layout: half width, on the same row as its neighbour (drag the field beside it in the editor; no CSS class needed); Conditional Logic (Advanced tab): Show this field if Convert is Volume..

Choices (tick show values and enter each value):

• teaspoon — value 4.929
• tablespoon — value 14.787 (selected by default)
• fluid ounce — value 29.574
• cup (US) — value 236.588
• pint (US) — value 473.176
• quart (US) — value 946.353
• millilitre — value 1
• litre — value 1000

5. From · Drop Down · ID 5
Layout: half width, on the same row as its neighbour (drag the field beside it in the editor; no CSS class needed); Conditional Logic (Advanced tab): Show this field if Convert is Weight..

Choices (tick show values and enter each value):

• ounce — value 28.3495 (selected by default)
• pound — value 453.592
• gram — value 1
• kilogram — value 1000

6. To · Drop Down · ID 6
Layout: half width, on the same row as its neighbour (drag the field beside it in the editor; no CSS class needed); Conditional Logic (Advanced tab): Show this field if Convert is Weight..

Choices (tick show values and enter each value):

• ounce — value 28.3495
• pound — value 453.592
• gram — value 1 (selected by default)
• kilogram — value 1000

7. Ingredient · Drop Down · ID 7
Layout: half width, on the same row as its neighbour (drag the field beside it in the editor; no CSS class needed); Conditional Logic (Advanced tab): Show this field if Convert is Cups to grams..

Choices (tick show values and enter each value):

• All-purpose flour (125 g per cup) — value 125 (selected by default)
• Granulated sugar (200 g) — value 200
• Brown sugar, packed (220 g) — value 220
• Powdered sugar (120 g) — value 120
• Butter (227 g) — value 227
• Honey or syrup (340 g) — value 340
• Rolled oats (90 g) — value 90
• Uncooked rice (185 g) — value 185
• Cocoa powder (100 g) — value 100
• Milk (240 g) — value 240
• Water (237 g) — value 237
• Vegetable oil (218 g) — value 218

8. Measured in · Drop Down · ID 8
Layout: half width, on the same row as its neighbour (drag the field beside it in the editor; no CSS class needed); Conditional Logic (Advanced tab): Show this field if Convert is Cups to grams..

Choices (tick show values and enter each value):

• cups — value 236.588 (selected by default)
• tablespoons — value 14.787
• teaspoons — value 4.929
• millilitres — value 1

9. Result · Number · ID 9
Number Format 9,999.99; Description “In the "To" unit.”; Custom CSS Class (Appearance tab) fo-result; tick Enable Calculation, Rounding 2; Conditional Logic (Advanced tab): Show this field if Convert is Volume..

{Amount:2} * {From vol:3} / {To vol:4}

10. Result · Number · ID 10
Number Format 9,999.99; Description “In the "To" unit.”; Custom CSS Class (Appearance tab) fo-result; tick Enable Calculation, Rounding 2; Conditional Logic (Advanced tab): Show this field if Convert is Weight..

{Amount:2} * {From wt:5} / {To wt:6}

11. Grams · Number · ID 11
Number Format 9,999.99; Description “Spooned and levelled, not packed, unless the ingredient says so.”; Custom CSS Class (Appearance tab) fo-result; tick Enable Calculation, Rounding 0; Conditional Logic (Advanced tab): Show this field if Convert is Cups to grams..

{Amount:2} * {Unit:8} / 236.588 * {Ingredient:7}

12. Ounces · Number · ID 12
Number Format 9,999.99; Custom CSS Class (Appearance tab) fo-result fo-result--sub; tick Enable Calculation, Rounding 2; Conditional Logic (Advanced tab): Show this field if Convert is Cups to grams..

{Amount:2} * {Unit:8} / 236.588 * {Ingredient:7} / 28.3495

3. Hide the submit button

The results are live, so nothing needs submitting. Add this filter to your theme’s functions.php or a code-snippets plugin; it hides the button on any form carrying the fo-live-only class:

add_filter( 'gform_submit_button', function ( $button, $form ) {
	return str_contains( (string) rgar( $form, 'cssClass' ), 'fo-live-only' ) ? '' : $button;
}, 10, 2 );

Or with CSS alone: .fo-live-only_wrapper .gform_footer { display: none; }

4. Put it on a page and make it look like this

Add the form to any page with the Gravity Forms block, or the shortcode [gravityform id="X" title="false" ajax="false"]. The form inherits your theme’s styles; the classes you set in step 2 are hooks for the look you see on this site:

• fo-result on a calculation field makes it the big teal result panel.
• fo-result fo-result--sub makes the smaller secondary figures.
• fo-segmented on a radio field turns it into a segmented switch.
• Two fields on one row is the editor’s own column layout: drag a field beside another and the row splits in half. No CSS class is needed, and the old gf_left_half Ready Classes are deprecated.

The bundle includes the two stylesheets that implement those classes, with notes on matching your brand colours. Without them the form still works; it just looks like your theme’s default Gravity Forms styling.

How the maths works is explained under “How it’s calculated” on the live Cooking measurement converter.