Sample Size Calculator Template

Find out how many people need to respond to a survey to produce statistically significant results.

Sample Size Calculator Template

Business

This template is included with the Business plan.

Classic Blue

This form is using the Classic Blue style template.

Trusted by over 300K+ users

The people have spoken. Their approval has us seeing stars - and we couldn't be prouder. With validation like this, Formidable Forms is one of the highest-rated WordPress plugins out there.

4.9/5 on

The plugin works perfectly. It offers you many configuration options and is very well structured. But the best thing about Formidable is the technical support. I needed a really special feature, and thanks to them I achieved it. They have gained a customer for life.

raulolivella

I've been using Formidable Forms and Views and have been delighted with the many ways I've been able to utilize them. Using Views to display form submission data on the front-end has been huge for me. And, the few times I've gotten stuck, I've reached out to support and have received actual, helpful responses.

pmterp

FF has transformed the way I approach form creation and management on my website. The visual editing capabilities give me intuitive and seamless design processes that save me time and effort. Next to that, the ease of creating multi-step forms that have better conversion rates makes setup a breeze. The overall flexibility and efficiency of Formidable Forms have significantly improved my workflow and site user experience.

zufo

I have been using the pro plugin of Formidable Forms for many years now. I can’t think of anything else that comes close to the quality and intuitiveness of this plugin for WordPress!

Tilasmi

I’ve been using formidable for almost ten years, on over a hundred websites. It’s the most refined form builder with the most flexibility than any other I’ve used. Plus, it’s just beautiful and just works.
The support framework our this plugin is top notch!

ddpweb

I have been using formidable forms for many years now and have built both small and large scale web applications with it. I have nothing but good to say about all my experiences with both the product and support.

tthayer

4.9 / 5

107 reviews on Capterra

4.8 / 5

92 reviews on G2

4.7 / 5

160 reviews on Trustpilot

4.8 / 5

1.300+ reviews on WordPress.org