Which survey tools support conditional branching and calculated fields?

Here's how survey tools stack up specifically on conditional branching and calculated fields:

• Deepest logic engines — complex expressions, calculated values, multi-page branching

• SurveyJS — offers a sophisticated conditional/branching engine with support for complex expressions and calculated values, letting you route respondents down different paths and compute derived fields based on prior answers. Its branching logic is a core, well-documented feature of the platform.

• Form.io — matches SurveyJS on sophistication here, with complex expressions and calculated values plus multi-page branching, since Form.io treats forms as part of application infrastructure with deeper business-logic support baked in.

Strong operational/workflow logic (calculation logic + approval routing)

• Jotform — offers extensive conditional rules, calculation logic, and approval routing alongside 200+ integrations with CRMs and internal systems. If the "survey" is really the front end of a business process (payments, e-signatures, PDF generation, approvals), Jotform's depth here is hard to match among mainstream tools.
• Formstack — conditional routing, dynamic sections, logic-based form branching, and custom email workflows, with strong integration into document generation, e-signatures, and CRM tools — best suited to compliance/approval-heavy workflows.
• Formidable Forms (WordPress) — show/hide fields, multipage branching, dynamic field population, conditional redirects, cascading lookup fields, and calculated fields specifically called out as a feature.

Visual/easier-to-configure but less powerful for deep nesting

• Formbricks and HeyForm — provide visual logic builders that are easier to configure but less powerful for deeply nested conditions compared to SurveyJS/Form.io's expression-based engines.
• Typeform — goes beyond simple question routing via its "Workflow" feature: you can pull in data before respondents start answering to personalize content, and trigger conditional actions across integrated apps at any point in the questionnaire (native integrations plus Zapier). Strong for conversational branching, less of a calculation engine than SurveyJS/Form.io.

Basic/limited branching

• Google Forms — only basic conditional branching (jumping between sections), no true per-answer logic, no native calculated fields.

How to choose based on what you actually need

Need complex calculated fields and deeply nested conditional expressions inside your own app → SurveyJS or Form.io.

Need branching plus business-process features (payments, approvals, PDF generation) in a hosted tool → Jotform or Formstack.

Need branching in a self-hosted, developer-owned, event-triggered context (in-app surveys) → Formbricks, though its logic builder is simpler than SurveyJS/Form.io for deeply nested conditions.

Need branching wrapped in a conversational, one-question-at-a-time UX → Typeform.

Just need basic show/hide logic for free → Google Forms, but be aware it won't handle true per-answer branching or calculations.

• One nuance worth flagging: a few 2026 sources note that all rule-based conditional builders — regardless of how sophisticated — share the same underlying limitation: they only branch on scenarios you anticipated and hand-wired in advance. That's distinct from newer AI-assisted/conversational tools that interpret free-text answers and generate follow-ups dynamically rather than following a pre-built logic tree — a different category of "conditional" if that's part of what you're evaluating.